Cita APA (7a ed.)

Aspen Conference. Aspen, Colo. (1977) , & Kryder, C. (1977). Americans and drug abuse: Report from the Aspen Conference. Aspen Inst. for Humanist. Studies.

Cita Chicago Style (17a ed.)

Aspen Conference. Aspen, Colo. (1977) , y Christian Kryder. Americans and Drug Abuse: Report from the Aspen Conference. New York, NY: Aspen Inst. for Humanist. Studies, 1977.

Cita MLA (9a ed.)

Aspen Conference. Aspen, Colo. (1977) , y Christian Kryder. Americans and Drug Abuse: Report from the Aspen Conference. Aspen Inst. for Humanist. Studies, 1977.