Παραπομπή APA

Ricardo, D. (1971). On the Principles of Political Economy and Taxation. Penguin.

Παραπομπή Chicago Style

Ricardo, David. On the Principles of Political Economy and Taxation. England: Penguin, 1971.

Παραπομπή MLA

Ricardo, David. On the Principles of Political Economy and Taxation. Penguin, 1971.