Cita APA (7a ed.)

Seymour, R. B., & Smith, D. E. (1987). Drugfree: A unique, positive approach to staying off alcohol and other drugs. Facts on File Publ.

Cita Chicago Style (17a ed.)

Seymour, Richard B., y David E. Smith. Drugfree: A Unique, Positive Approach to Staying off Alcohol and Other Drugs. New York, NY [u.a.]: Facts on File Publ, 1987.

Cita MLA (9a ed.)

Seymour, Richard B., y David E. Smith. Drugfree: A Unique, Positive Approach to Staying off Alcohol and Other Drugs. Facts on File Publ, 1987.