Cita APA (7a ed.)

Brown, C. G., & Lawton, J. (1988). Illicit drug use in Portsmouth and Havant: A local study of a national problem. PSI research report.

Cita Chicago Style (17a ed.)

Brown, Colin G., y Jean Lawton. "Illicit Drug Use in Portsmouth and Havant: A Local Study of a National Problem." PSI Research Report 1988.

Cita MLA (9a ed.)

Brown, Colin G., y Jean Lawton. "Illicit Drug Use in Portsmouth and Havant: A Local Study of a National Problem." PSI Research Report, 1988.