Sources and how they were checked

304 distinct sources support the profiles, practice contexts and university examples. Each is shown with the part that was read and every place it is used. Sources were last checked on October 21, 2026.

What each inspection label means

Full page read: The page's substantive text was read, not only a title or navigation.
Selected text read: Only the part of the page relevant to the claim was read; the rest was not.
Abstract only: Only the abstract or landing page of a longer work was read. The full text was not.
Search snippet only: Seen only as search-result text. A snippet is a lead, never evidence.
Not accessed: The page did not open (blocked, removed or timed out). A source in this state supports no claim, alone or as the only evidence.

Pages were read through a text-extraction tool, so an extract is a working reading, not a certified copy of the page. The date shown for a check is an access date. It is not the publication date of the source, and a page can change after it was checked. A second, independent reviewer opened the cited pages again and judged each claim before any profile was admitted.

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304 sources, ordered by name A to Z

Sources and how they were checked

What each inspection label means

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