Cita APA (7a ed.)

Attenborough, D. (1990). The trials of life: A natural history of animal behavior. Little, Brown.

Cita Chicago Style (17a ed.)

Attenborough, David. The Trials of Life: A Natural History of Animal Behavior. Boston: Little, Brown, 1990.

Cita MLA (9a ed.)

Attenborough, David. The Trials of Life: A Natural History of Animal Behavior. Little, Brown, 1990.