Gichuki, J. W., R. Opiyo, P. Mugyenyi, and K. Namusisi. “Healthcare providers’ Level of Involvement in Provision of Smoking Cessation Interventions in Public Health Facilities in Kenya”. Journal of Public Health in Africa, vol. 6, no. 2, Aug. 2015, doi:10.4081/jphia.2015.523.