एपीए उद्धरण

Orr,David W. (1979). The global predicament. University of North Carolina Press.

शिकागो स्टाइल उद्धरण

Orr,David W. The Global Predicament. Chapel Hill: University of North Carolina Press, 1979.

एमएलए उद्धरण

Orr,David W. The Global Predicament. University of North Carolina Press, 1979.