Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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