1. Buisman WR. Drug education: programmes and methodology; an overview of opportunities for drug prevention. UNESCO; 1995.
2. Adolescent drug abuse - awareness and prevention;Chakravarthy B;Indian J Med Res,2013
3. Early-onset drug use and risk for drug dependence problems;Chen CY;Addict Behav,2009
4. Hong Kong Narcotics Division. (2023). Newly/previously reported drug abusers by age group. https://www.nd.gov.hk/statistics_list/doc/chart1.pdf.
5. Lloyd A, Joyce R, Hurry J, Ashton M. (2000). The Effectiveness of Primary School.