Author's Last Name, First Name. "Title of the blog posting in quotes." Name of the blog italicized, date of the posting day month year, URL.
Cole, Juan. "The World After the Kerry-Lavrov Accord on Syria." Informed Comment, 15 Sept. 2013, www.juancole.com/2013/09/lavrov-accord-syria.html.
Name of person interviewed. Type of interview. Day Month Year.
Justin Bieber. Personal Interview. 16 Sept. 2013.