APA (7e ed.) Bronvermelding
Geer, J. G. (2006). In defense of negativity: Attack ads in presidential campaigns. University of Chicago Press.
Chicago (17e ed.) Bronvermelding
Geer, John Gray. In Defense of Negativity: Attack Ads in Presidential Campaigns. Chicago: University of Chicago Press, 2006.
MLA (9e ed.) Bronvermelding
Geer, John Gray. In Defense of Negativity: Attack Ads in Presidential Campaigns. University of Chicago Press, 2006.
Let op: Deze citaties zijn niet altijd 100% accuraat.