APA استشهاد

Sen, A. K., & Ahmed, A. (1999). Drug abuse and youth: A psychological Study. Gyan Pub. House.

استشهاد بنمط شيكاغو

Sen, A. K., و Anis Ahmed. Drug Abuse and Youth: A Psychological Study. New Delhi: Gyan Pub. House, 1999.

MLA استشهاد

Sen, A. K., و Anis Ahmed. Drug Abuse and Youth: A Psychological Study. Gyan Pub. House, 1999.