Dyfyniad APA
Ricardo, D. (2001). On the principles of political economy and taxation. Electric Book Co..
Dyfyniad Arddull Chicago
Ricardo, David. On the Principles of Political Economy and Taxation. London: Electric Book Co., 2001.
Dyfyniad MLA
Ricardo, David. On the Principles of Political Economy and Taxation. Electric Book Co., 2001.
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