Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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