O'Neil, P. H. (2012). Essentials of comparative politics (4th edition.). W. W. Norton and Co.
Chicago-referens (17:e uppl.)O'Neil, Patrick H. Essentials of Comparative Politics. 4th edition. New York: W. W. Norton and Co, 2012.
MLA-referens (9:e uppl.)O'Neil, Patrick H. Essentials of Comparative Politics. 4th edition. W. W. Norton and Co, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.