Cita APA (7a ed.)

Krapp, K. M., & Blachford, S. (2003). Drugs and controlled substances: Information for students. Thomson/Gale.

Cita Chicago Style (17a ed.)

Krapp, Kristine M., y Stacey Blachford. Drugs and Controlled Substances: Information for Students. Detroit, Mich. [u.a.]: Thomson/Gale, 2003.

Cita MLA (8a ed.)

Krapp, Kristine M., y Stacey Blachford. Drugs and Controlled Substances: Information for Students. Thomson/Gale, 2003.