APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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