APA (7th ed.) Zitazioa

Caldwell, L. K. (1972). In defense of earth: International protection of the biosphere. Indiana University Press.

Chicago Style (17th ed.) Zitazioa

Caldwell, Lynton K. In Defense of Earth: International Protection of the Biosphere. London: Indiana University Press, 1972.

MLA (9th ed.) Zitazioa

Caldwell, Lynton K. In Defense of Earth: International Protection of the Biosphere. Indiana University Press, 1972.