1. Afrobarometer/Mass Public Opinion. (2017, May 3). Zimbabweans place most trust in religious leaders. NGOs and President Mugabe. Available at
http://afrobarometer.org/sites/default/files/press-release/zimbabwe/zim_r7_pr2_trust_in_institutions.pdf
. Accessed 15 February 2018.
2. Airne, D., & Benoit, W. L. (2007). Political advertising in campaign 2000. Communication Quarterly, 53(4), 473–492.
3. Ansolabehere, S., & Iyengar, S. (1995). Going Negative: How Attack Ads Shrink and Polarise Electorate. New York: Free Press.
4. Ansolabehere, S., Iyengar, S., & Valentino, N. (1994). Does attack advertising demobilize the electorate? American Political Science Review, 88(4), 829–838.
5. Benoit, W. L. (1999). Seeing spots: A functional analysis of presidential television. Westport, CT: Praeger.