Author. Year of post. "Title of Post." Type of Post, Month Day, Year of post, URL
Note: Include the real and screen name for the author.
Rudd, Kevin. 2009 "Civilian Corps to Help in Crises." Facebook, October 24, 2009. http://www.facebook.com/note.php?note_id=200124043571&ref=mf
O'Brien, Conan (@ConanOBrien). 2015. "In honor of Earth Day, I'm recycling my tweets." Twitter, April 22, 2015, 11:10 a.m. https://twitter.com/ConanOBrien/status/590940792967016448
Note: If the author, editor, translator, of the like is unknown, the reference should start with the title. Works attributed to "Anonymous" should use this as the author.
Title of Work. Year of publication. Edition. Location: Publisher. URL
Anonymous. Year of publication. Title of Work. Edition. Location: Publisher. URL
Anonymous. 1796. On the Prosodies of teh Greek and Latin Languages. London.
Macroeconomics, Prices and Quantities: Essays in Memory of Arthur M. Okun. 1983. Oxford: Blackwell.
If the location is unknown, the abbreviation n.p. takes the place of the location.
If the publisher is unknown, just enter the location and date.
If the year is unknown, the abbreviation n.d. or an estimated year in brackets bakes the place of the year.
Browne, J. D. n.d. Forensic Science as a Career. London: Tower.
Smythe, V. [2007?]. Ant Colonies: How They Communicate. Canberra: Emu.
It is always better to read the original source of a quote, however, you may not always have access to the original source. When citing a source you haven't read yourself, but which is referred to in a source you have read, include the original author and date in the text and cite the secondary source.
Schwartz 1987 (quoted in Burton, Westen and Kowalski 2009, p.576) stated that "..."
Burton, Lorelle, Drew Westen and Robin Kowalski. 2009. Psychology. 2nd ed. Milton, Australia: Wiley.