APA-referens (7:e uppl.)

Brewer, R. (1979). Principles of ecology. Saunders.

Chicago-referens (17:e uppl.)

Brewer, Richard. Principles of Ecology. Philadelphia: Saunders, 1979.

MLA-referens (8:e uppl.)

Brewer, Richard. Principles of Ecology. Saunders, 1979.