APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

Simmons, Ian Gordon. The Ecology of Natural Resources. 2nd ed. London: Edward Arnold, 1981.

MLA-referens (9:e uppl.)

Simmons, Ian Gordon. The Ecology of Natural Resources. 2nd ed. Edward Arnold, 1981.