Cita APA (7th ed.)

Elton, C. S. (1953). The ecology of animals (3d ed.). Methuen.

Cita Chicago (17th ed.)

Elton, Charles S. The Ecology of Animals. 3d ed. London: Methuen, 1953.

Cita MLA (8th ed.)

Elton, Charles S. The Ecology of Animals. 3d ed. Methuen, 1953.