Cita APA (7a ed.)

Falk, R. A. (1972). This endangered planet: Prospects and proposals for human survival. Vintage.

Cita Chicago Style (17a ed.)

Falk, Richard A. This Endangered Planet: Prospects and Proposals for Human Survival. Nueva York: Vintage, 1972.

Cita MLA (9a ed.)

Falk, Richard A. This Endangered Planet: Prospects and Proposals for Human Survival. Vintage, 1972.