Cita APA (7a ed.)

Falk, R. A. (1971). This Endangered Planet. Random House.

Cita Chicago Style (17a ed.)

Falk, Richard A. This Endangered Planet. Estados Unidos de Norteamérica: Random House, 1971.

Cita MLA (8a ed.)

Falk, Richard A. This Endangered Planet. Random House, 1971.