Cita APA (7a ed.)

Simmons, I. G. (1981). The ecology of natural resources (2a ed.). Edward Arnold.

Cita Chicago Style (17a ed.)

Simmons, I. G. The Ecology of Natural Resources. 2a ed. London: Edward Arnold, 1981.

Cita MLA (9a ed.)

Simmons, I. G. The Ecology of Natural Resources. 2a ed. Edward Arnold, 1981.