APA-referens (7:e uppl.)

Ricardo, D., & Kolthammer, F. W. (2004). The principles of political economy and taxation. Dover Publications.

Chicago-referens (17:e uppl.)

Ricardo, David, och F. W. Kolthammer. The Principles of Political Economy and Taxation. Mineola, N.Y.: Dover Publications, 2004.

MLA-referens (8:e uppl.)

Ricardo, David, och F. W. Kolthammer. The Principles of Political Economy and Taxation. Dover Publications, 2004.