एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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