Lua APA (7ú heag.)
ebrary, Inc, & Crotty, W. J. (2012). The Obama presidency: Promise and performance. Lexington Books.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, agus William J. Crotty. The Obama Presidency: Promise and Performance. Lanham, Md.: Lexington Books, 2012.
Lua MLA (9ú heag.)
ebrary, Inc, agus William J. Crotty. The Obama Presidency: Promise and Performance. Lexington Books, 2012.
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