APA Citation Style, 6th edition  Tags: apa_style citation works_cited_list bibliography_american_psychological_association  

• All lines after the first line of each entry in your reference list should be indented one-half inch from the left margin. This is called hanging indentation.
• Authors' names are inverted (last name first); give the last name and initials for all authors of a particular work unless the work has more than six authors. If the work has more than six authors, list the first six authors and then use et al. after the sixth author's name to indicate the rest of the authors.
• Reference list entries should be alphabetized by the last name of the first author of each work.
• If you have more than one article by the same author, single-author references or multiple-author references with the exact same authors in the exact same order are listed in order by the year of publication, starting with the earliest.
• When referring to any work that is NOT a journal, such as a book, article, or Web page, capitalize only the first letter of the first word of a title and subtitle, the first word after a colon or a dash in the title, and proper nouns. Do not capitalize the first letter of the second word in a hyphenated compound word.
• Capitalize all major words in journal titles.
• Italicize titles of longer works such as books and journals.
• Do not italicize, underline, or put quotes around the titles of shorter works such as journal articles or essays in edited collections.

Taken from the OWL at Purdue