The books, articles, reports, government pages and reference works this atlas cites as evidence for what it asserts about criminology, forensic science and criminal justice, each carrying an author or publisher, a year where one is documented and a reliability tier where one can be established. A source entry is what a reader follows to check a claim rather than take the atlas at its word, and the kind of source it is, such as a journal article or a government record, groups it into one of this atlas's own source subcategories.