The reference for the Milgram article (but not the Snow reference) should then appear in the reference list at the end of your paper.
Contributors' names and the last edited date can be found in the orange boxes at the top of every page on the OWL.
In the APA reference list, the writer should provide the author, year, title, and source of the cited work in an alphabetical list of references. If a reference is not cited in the text, it should not be included in the reference list. The reference format varies slightly depending on the document type (., journal article, edited book chapter, blog post), but broadly speaking always follows the same pattern of author, date, title, source.