Langbahn Team – Weltmeisterschaft

Wikipedia:Tiers of reliability

Tier 1: most reliable

Peer-reviewed publications

Academic books

Tier 2: more reliable

Non-peer-reviewed academic publications

Mass-market books

Highly-reputable international journalism

Tier 3: reliable

Tertiary sources

Other generally reliable news sources

Expert self-published

Tier 4: limited use

Non-expert self-published

Questionable sources

Primary sources

See also

Policies
  • Verifiability (WP:V)
  • No original research (WP:NOR)
Guidelines
Explanatory supplements
General essays
Topic-specific essays
  • Identifying reliable sources (history) (WP:HISTRS)
  • Identifying reliable sources (law) (WP:RSLAW)
  • Identifying reliable sources (science) (WP:SCIRS)
  • Identifying reliable sources (medicine) (WP:MEDRS)
  • Identifying and using style guides (WP:STYLEGUIDES)
  • Using maps and similar sources in Wikipedia articles (WP:MAPCITE)
Other
  • Reliable sources/Noticeboard (WP:RSN)
  • Reliable sources/Perennial sources (WP:RSP)
  • Common knowledge (WP:CK)
  • How to mine a source (WP:MINE)