APA-čujuhus (7. p.)
Geer, J. G. (2006). In defense of negativity: Attack ads in presidential campaigns. University of Chicago Press.
Chicago-čujuhus (17. p.)
Geer, John Gray. In Defense of Negativity: Attack Ads in Presidential Campaigns. Chicago: University of Chicago Press, 2006.
MLA-čujuhus (9. p.)
Geer, John Gray. In Defense of Negativity: Attack Ads in Presidential Campaigns. University of Chicago Press, 2006.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.