Cita APA (7a ed.)

Walsh, G. P. (1981). Opium and nacotics laws. U.S. Gov. Print. Office.

Cita Chicago Style (17a ed.)

Walsh, Gerard P. Opium and Nacotics Laws. Washington, DC: U.S. Gov. Print. Office, 1981.

Cita MLA (8a ed.)

Walsh, Gerard P. Opium and Nacotics Laws. U.S. Gov. Print. Office, 1981.