Dyfyniad APA

Clark, C. (1957). The conditions of economic progress (3rd ed.). Macmillan.

Dyfyniad Arddull Chicago

Clark, Colin. The Conditions of Economic Progress. 3rd ed. London: Macmillan, 1957.

Dyfyniad MLA

Clark, Colin. The Conditions of Economic Progress. 3rd ed. Macmillan, 1957.

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