References
Annual Reports, 1845-1976, Commissioner of Police, Hong Kong. Bulletin on Narcotics, April-June, 1953, United Nations.
Bulletin, 1955-1976, Narcotics Bureau, Royal Hong Kong Police. Vanquishing the Dragon, The Law of Drugs in Hong Kong. Faulkner R.J, Field R.A, Centre of Asian Studies, University of Hong Kong.
Heroin Manufacture in Hong Kong, 1966, Narcotics Bureau, Royal Hong Kong Police.
Heroin Manufacture in Hong Kong, 1973, Narcotics Bureau, Royal Hong Kong Police.
The History of the Hong Kong Police Force (Unpublished).
The Traffic in Opium and Other Dangerous Drugs, 1930–1939, Government of Hong Kong.
The Traffic in Prepared Opium, 1930-1939, Government of Hong Kong. The Traffic in Opium and Other Dangerous Drugs, 1947-1954, Government of Hong Kong.