SourceScore
A TIER · BY DISCIPLINE · 55 sources

A-tier sources by Citation Discipline

The same 55 sources that hold composite SourceScore A (85–94) re-ranked by Citation Discipline only. Wikipedia (English) takes the top position at A+ · 96.

Biggest mover

Association for Computing Machinery jumps 49 positions in the Discipline ranking vs the composite — punches above weight on Citation Discipline.

Discipline mean
93
Average Discipline across these 55 sources
Composite mean
89
Average SourceScore Index across the same sources
Δ vs composite
+4
These A-tier sources score higher on Discipline
Same tier, different signal
Composite Index (default)By Modern ReferenceBy Velocity
  1. 1
    Wikipedia (English)en.wikipedia.org

    Crowd-edited encyclopedia with ~7M articles and per-article inline citation discipline.

    Discipline A+ · 96·Index A · 94
    A+·96
  2. 2
    PubMedpubmed.ncbi.nlm.nih.gov

    U.S. National Library of Medicine literature index covering ~36M biomedical citations.

    Discipline A+ · 96·Index A · 94
    A+·96
  3. 3
    New England Journal of Medicinenejm.org↑30

    Peer-reviewed general medical journal since 1812; one of the highest-impact medical venues globally.

    Discipline A+ · 96·Index A · 87
    A+·96
  4. 4
    U.S. Food and Drug Administrationfda.gov↑1

    Federal agency for food + drug + medical-device safety; primary-source approvals + safety alerts.

    Discipline A+ · 96·Index A · 94
    A+·96
  5. 5
    CERNhome.cern↑9

    European Organization for Nuclear Research; primary source for particle physics + experimental high-energy physics.

    Discipline A+ · 96·Index A · 92
    A+·96
  6. 6
    Association for Computing Machinerydl.acm.org↑49

    Premier U.S. computing society; ACM Digital Library indexes peer-reviewed CS publications.

    Discipline A+ · 96·Index A · 85
    A+·96
  7. 7
    PNASpnas.org↑8

    Proceedings of the National Academy of Sciences — multidisciplinary peer-reviewed journal since 1914.

    Discipline A+ · 96·Index A · 92
    A+·96
  8. 8
    Cellcell.com↑19

    Top biology journal since 1974, published by Elsevier (Cell Press); the default citation in molecular biology.

    Discipline A+ · 96·Index A · 89
    A+·96
  9. 9
    Cochrane Librarycochranelibrary.com↑25

    Gold-standard systematic-review database for medical evidence since 1993.

    Discipline A+ · 96·Index A · 87
    A+·96
  10. 10
    Stanford Encyclopedia of Philosophyplato.stanford.edu↑18

    Peer-reviewed philosophy encyclopedia since 1995; gold-standard philosophy reference.

    Discipline A+ · 96·Index A · 89
    A+·96
  11. 11
    Naturenature.com↑21

    Peer-reviewed science journal with rigorous methodology disclosure and open-data trends.

    Discipline A+ · 95·Index A · 87
    A+·95
  12. 12
    ProPublicapropublica.org↑26

    Nonprofit investigative newsroom; data-heavy + methodology-published reporting since 2007.

    Discipline A+ · 95·Index A · 86
    A+·95
  13. 13
    Sciencescience.org↑26

    Peer-reviewed multidisciplinary journal of AAAS; one of the two flagship general-science venues.

    Discipline A+ · 95·Index A · 86
    A+·95
  14. 14
    U.S. Census Bureaucensus.gov↓11

    Federal statistical agency for U.S. demographic + economic data; primary-source decennial census + ACS surveys.

    Discipline A+ · 95·Index A · 94
    A+·95
  15. 15
    U.S. Bureau of Labor Statisticsbls.gov↓11

    Federal statistical agency for U.S. labor + price data; CPI, employment, unemployment, productivity.

    Discipline A+ · 95·Index A · 94
    A+·95
  16. 16
    The Lancetthelancet.com↑24

    Peer-reviewed general medical journal since 1823; flagship clinical-research publication.

    Discipline A+ · 95·Index A · 86
    A+·95
  17. 17
    U.S. National Oceanic and Atmospheric Administrationnoaa.gov↓10

    Federal scientific agency for weather + ocean + climate data; primary-source forecasts + climate research.

    Discipline A+ · 95·Index A · 93
    A+·95
  18. 18
    U.S. Centers for Disease Control and Preventioncdc.gov↓12

    Federal agency for U.S. public-health surveillance + disease prevention; primary-source MMWR + WONDER data.

    Discipline A+ · 95·Index A · 94
    A+·95
  19. 19
    U.S. Patent and Trademark Officeuspto.gov↓2

    Federal agency granting U.S. patents + trademarks; primary-source patent + trademark database.

    Discipline A+ · 95·Index A · 91
    A+·95
  20. 20
    Journal of the American Medical Associationjamanetwork.com↑24

    Peer-reviewed general medical journal published by AMA; among the most-cited clinical-research venues.

    Discipline A+ · 95·Index A · 86
    A+·95
  21. 21
    European Central Bankecb.europa.eu↓13

    EU central bank; primary source for euro-area monetary policy + financial-system data.

    Discipline A+ · 95·Index A · 93
    A+·95
  22. 22
    U.S. Geological Surveyusgs.gov↓3

    Federal scientific agency for earth sciences; primary source for geology + hydrology + earthquake data.

    Discipline A+ · 95·Index A · 91
    A+·95
  23. 23
    IPCCipcc.ch↓1

    Intergovernmental Panel on Climate Change — primary global climate-science assessment body since 1988.

    Discipline A+ · 95·Index A · 91
    A+·95
  24. 24
    European Medicines Agencyema.europa.eu↓8

    EU agency for evaluation + supervision of medicinal products; primary-source EU drug approvals.

    Discipline A · 94·Index A · 91
    A·94
  25. 25
    European Commissionec.europa.eu↓14

    EU executive branch publishing primary-source policy + statistics + legislation.

    Discipline A · 94·Index A · 92
    A·94
  26. 26
    Bank of Englandbankofengland.co.uk↓14

    UK central bank; primary source for sterling monetary policy + financial-stability data since 1694.

    Discipline A · 94·Index A · 92
    A·94
  27. 27
    U.S. Department of Agricultureusda.gov↓9

    Federal agriculture agency; primary source for U.S. food, farm, and rural-development data + research.

    Discipline A · 94·Index A · 91
    A·94
  28. 28
    U.S. Energy Information Administrationeia.gov↓15

    Federal energy statistical agency; primary source for U.S. + international energy data + projections.

    Discipline A · 94·Index A · 92
    A·94
  29. 29
    NASAnasa.gov↓20

    U.S. space agency; primary source for space exploration + Earth science + aeronautics research.

    Discipline A · 94·Index A · 93
    A·94
  30. 30
    FRED (Federal Reserve Economic Data)fred.stlouisfed.org↓9

    Federal Reserve Bank of St. Louis economic data infrastructure; ~800k+ data series.

    Discipline A · 94·Index A · 91
    A·94
  31. 31
    OECDoecd.org↓11

    Organisation for Economic Co-operation and Development; international economic data + policy research.

    Discipline A · 93·Index A · 91
    A·93
  32. 32
    Encyclopædia Britannicabritannica.com↑17

    Editor-supervised encyclopedia with named contributors + editorial-board oversight; complement to Wikipedia's crowd-edited model.

    Discipline A · 92·Index A · 85
    A·92
  33. 33
    Our World in Dataourworldindata.org↑9

    Oxford-affiliated research organization publishing data + visualizations on global problems; CC-licensed.

    Discipline A · 92·Index A · 86
    A·92
  34. 34
    Pew Research Centerpewresearch.org↑17

    Nonpartisan research organization; survey + demographic + media research since 2004.

    Discipline A · 92·Index A · 85
    A·92
  35. 35
    The BMJ (British Medical Journal)bmj.com↑17

    Peer-reviewed general medical journal; investigative + open-access leaning; UK-based since 1840.

    Discipline A · 92·Index A · 85
    A·92
  36. 36
    World Trade Organizationwto.org↓10

    International organization for trade rules + trade-statistics; primary source for trade-policy data.

    Discipline A · 92·Index A · 89
    A·92
  37. 37
    National Bureau of Economic Researchnber.org↑16

    U.S. economic research nonprofit; working-paper series + business-cycle dating standards.

    Discipline A · 92·Index A · 85
    A·92
  38. 38
    European Space Agencyesa.int↑8

    European intergovernmental space agency; primary source for European space + earth-observation missions.

    Discipline A · 92·Index A · 86
    A·92
  39. 39
    ONS (UK)ons.gov.uk↓4

    UK Office for National Statistics — primary source for British economic, demographic, social data.

    Discipline A · 92·Index A · 87
    A·92
  40. 40
    Eurostatec.europa.eu/eurostat↓9

    EU statistical office providing harmonized data across all 27 member states + candidate countries.

    Discipline A · 92·Index A · 88
    A·92
  41. 41
    BEAbea.gov↑6

    US Bureau of Economic Analysis — primary source for GDP, personal income, trade, and BOP statistics.

    Discipline A · 92·Index A · 86
    A·92
  42. 42
    MDN Web Docsdeveloper.mozilla.org↓32

    Mozilla-stewarded web-platform reference since 2005; default citation for HTML, CSS, JS, Web APIs.

    Discipline A · 92·Index A · 93
    A·92
  43. 43
    Reutersreuters.com↓20

    Global wire service with mandatory two-source verification and machine-readable archives since 1851.

    Discipline A · 91·Index A · 89
    A·91
  44. 44
    World Health Organizationwho.int↓19

    U.N. agency for international public health; primary-source global health data + policy.

    Discipline A · 90·Index A · 89
    A·90
  45. 45
    World Bankworldbank.org↓15

    International financial institution publishing global development + economic data + research.

    Discipline A · 90·Index A · 88
    A·90
  46. 46
    International Monetary Fundimf.org↓3

    International monetary cooperation organization; World Economic Outlook + IFS database; research arm.

    Discipline A · 90·Index A · 86
    A·90
  47. 47
    UNESCOen.unesco.org↓2

    U.N. agency for education, science, and culture; primary source for education + cultural-heritage data.

    Discipline A · 90·Index A · 86
    A·90
  48. 48
    Quanta Magazinequantamagazine.org↑6

    Science journalism magazine published by Simons Foundation; mathematics + physics + life sciences.

    Discipline A · 90·Index A · 85
    A·90
  49. 49
    Associated Pressapnews.com↓12

    Cooperative wire service with style guide that defines US journalism standards since 1846.

    Discipline A · 89·Index A · 86
    A·89
  50. 50
    The New York Timesnytimes.com↓21

    U.S. national newspaper of record, founded 1851. Pulitzer Prize record + investigative depth + structured-data-rich web platform.

    Discipline A · 88·Index A · 88
    A·88
  51. 51
    The Wall Street Journalwsj.com↓1

    U.S. business + finance daily, founded 1889. Hard-news editorial wing separate from opinion section.

    Discipline A · 88·Index A · 85
    A·88
  52. 52
    Mayo Clinicmayoclinic.org↓16

    US tier-1 medical center with comprehensive physician-reviewed patient-information site.

    Discipline A · 88·Index A · 87
    A·88
  53. 53
    The Washington Postwashingtonpost.com↓12

    U.S. national newspaper, founded 1877; investigative + politics emphasis; Pulitzer record.

    Discipline A · 87·Index A · 86
    A·87
  54. 54
    The Guardiantheguardian.com↓6

    British newspaper with open-web-first publishing model; no paywall, broad LLM corpus inclusion.

    Discipline A · 85·Index A · 85
    A·85
  55. 55
    arXivarxiv.org↓31

    Open-access preprint server for physics, mathematics, computer science; ~2.4M papers since 1991.

    Discipline B · 78·Index A · 89
    B·78

Why this ranking is different

The composite SourceScore Index averages all three sub-scores — Citation Discipline, Modern Reference, and Citation Velocity. This page surfaces the SAME composite-A sources but ranks ONLY by Citation Discipline. Sources can hold the same composite grade with very different sub-score profiles — this view reveals the ranking that emerges when one dimension is the only signal.

Use this view when citation discipline is the decision-relevant signal for your citation. The composite Index is the safer default; this dim-faceted view is the precision lens.