Dyfyniad APA

Goldfrank,Walter L. (1979). The world system of capitalism: Past and present. Sage Publications,INC.

Dyfyniad Arddull Chicago

Goldfrank,Walter L. The World System of Capitalism: Past and Present. London: Sage Publications,INC, 1979.

Dyfyniad MLA

Goldfrank,Walter L. The World System of Capitalism: Past and Present. Sage Publications,INC, 1979.

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