APA-referens (7:e uppl.)
Geer, J. G. (2006). In defense of negativity: Attack ads in presidential campaigns. University of Chicago Press.
Chicago-referens (17:e uppl.)
Geer, John Gray. In Defense of Negativity: Attack Ads in Presidential Campaigns. Chicago: University of Chicago Press, 2006.
MLA-referens (9:e uppl.)
Geer, John Gray. In Defense of Negativity: Attack Ads in Presidential Campaigns. University of Chicago Press, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.