Scholarly sources are books, articles, websites, or individual papers that are published by academics, organizations, agencies, or governmental departments. They are sometimes (but not always) peer reviewed.

Grey literature is an example of a type of scholarly source that is not peer reviewed.

Peer reviewed articles are an example of scholarly sources. Peer reviewed articles are published in scholarly, peer reviewed journals and are usually either:

• original research articles that typically follow a consistent format (with sections such as Abstract, Introduction, Methods, Results, etc.) or
• review articles (e.g., literature reviews, meta-analyses, systematic reviews, etc.)

Example timeline of the peer review process: