Cita APA (7a ed.)

Southwick, C. H. (1972). Ecology and the Quality of our Environment. D.Van Nostrand.

Cita Chicago Style (17a ed.)

Southwick, Charles H. Ecology and the Quality of Our Environment. New York: D.Van Nostrand, 1972.

Cita MLA (9a ed.)

Southwick, Charles H. Ecology and the Quality of Our Environment. D.Van Nostrand, 1972.