Cita APA (7a ed.)

Harms, E. (1973). Drugs and youth: The challange of today. Pergamon Pr.

Cita Chicago Style (17a ed.)

Harms, Ernest. Drugs and Youth: The Challange of Today. New York [u.a.]: Pergamon Pr, 1973.

Cita MLA (9a ed.)

Harms, Ernest. Drugs and Youth: The Challange of Today. Pergamon Pr, 1973.