एपीए उद्धरण

(1992). The world environment 1972-1992: Two decades of challenge. London: Chapman and Hall.

शिकागो स्टाइल उद्धरण

The World Environment 1972-1992: Two Decades of Challenge. London: Chapman and Hall, 1992.

एमएलए उद्धरण

The World Environment 1972-1992: Two Decades of Challenge. London: Chapman and Hall, 1992.