Cita APA (7a ed.)

Petersen, D. M. (1978). Drug use among the aged. Addictive diseases.

Cita Chicago Style (17a ed.)

Petersen, David M. "Drug Use Among the Aged." Addictive Diseases 1978.

Cita MLA (9a ed.)

Petersen, David M. "Drug Use Among the Aged." Addictive Diseases, 1978.