Cita APA (7a ed.)

Hartnoll, R. (1989). A multi-city study of drug misuse in Europe. Bulletin on narcotics, 41(1/2), 3-27.

Cita Chicago Style (17a ed.)

Hartnoll, Richard. "A Multi-city Study of Drug Misuse in Europe." Bulletin on Narcotics 41, no. 1/2 (1989): 3-27.

Cita MLA (9a ed.)

Hartnoll, Richard. "A Multi-city Study of Drug Misuse in Europe." Bulletin on Narcotics, vol. 41, no. 1/2, 1989, pp. 3-27.