ISBN 0-226-79012-6 Tupper, Kenneth. The Globalization of Ayahuasca: HarmReduction or Benefit Maximization?. International Journal of Drug Policy. August
请检查|access-date=中的日期值 (帮助) Painfully Obvious - A Community Resource Fact sheets and HarmReduction Strategies About Depressants and Other Recreational Drugs U.S. Department