Cita APA (7a ed.)

Cohen, S. (1967). Problemas and Trends in American Geography. Basic Books.

Cita Chicago Style (17a ed.)

Cohen, Saul. Problemas and Trends in American Geography. New York: Basic Books, 1967.

Cita MLA (9a ed.)

Cohen, Saul. Problemas and Trends in American Geography. Basic Books, 1967.