Muula, A., S. Siziya, and E. Rudatsikira. “Prevalence and Correlates of Cigarette Smoking Among Adolescents in Malawi: Results from the Global Youth Tobacco Survey 2005”. Tanzania Journal of Health Research, vol. 10, no. 3, Sept. 2008, pp. 166-7, doi:10.4314/thrb.v10i3.14357.