Cita APA (7a ed.)

Roscher, W. (1972). Principles of political economy. Arno Press.

Cita Chicago Style (17a ed.)

Roscher, Wilhelm. Principles of Political Economy. New York: Arno Press, 1972.

Cita MLA (9a ed.)

Roscher, Wilhelm. Principles of Political Economy. Arno Press, 1972.