Cita APA (7a ed.)

Dull, R. T. (1981). An empirical examination of competing theories of drug use. Univ. Microfilms Internat.

Cita Chicago Style (17a ed.)

Dull, R. Thomas. An Empirical Examination of Competing Theories of Drug Use. Ann Arbor, Mich: Univ. Microfilms Internat, 1981.

Cita MLA (9a ed.)

Dull, R. Thomas. An Empirical Examination of Competing Theories of Drug Use. Univ. Microfilms Internat, 1981.