1. Africa Check. (2016)Do 15% of SA's population have a drug problem? We fact‐check 4 ‘shocking stats’ Published: 23 June 2016 05:37https://africacheck.org/reports/do-15-of-s-africans-have-a-drug-problem-we-fact-check-4-shocking-drug-statistics/
2. WHAT IS POLICY? TEXTS, TRAJECTORIES AND TOOLBOXES
3. Process-Tracing Methods
4. Establishing Outcomes for Service Coordination
5. Cabrera D. A.(2006).Systems thinking. A Dissertation Presented to the Faculty of the Graduate School of Cornell University. Available at:https://ecommons.cornell.edu/bitstream/handle/1813/2860/DerekCabreraDissertation.pdf