APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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