Cita APA

Earle, R. B., & Earle, R. B. (1975). PSI and political science: Using the personalized system of instruction to Teach American Politics. Washington, D.C.: American Political Science Association.

Citación estilo Chicago

Earle, Ralph B., y Ralph B. Earle. PSI and Political Science: Using the Personalized System of Instruction to Teach American Politics. Washington, D.C.: American Political Science Association, 1975.

Cita MLA

Earle, Ralph B., y Ralph B. Earle. PSI and Political Science: Using the Personalized System of Instruction to Teach American Politics. Washington, D.C.: American Political Science Association, 1975.