APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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