APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.