Alphabetize references by the last name of the first author of each work. If no author is listed, alphabetize by the title, ignoring any initial articles (A, An, The).
Arrange multiple works by the same author(s) by year of publication, with the earliest first.
Use lowercase letters (a, b, c) with the year to order entries if more than one work appeared in a given year.
Arrange works by one author followed by works with coauthors alphabetically by the second author's last name, or by the first coauthor if the author and coauthor are listed in that order.
Arrange works by the same author and same year alphabetically by title,