Cita APA (7a ed.)

Attenborough, D. (1992). Discovering life on earth: A natural history. Collins.

Cita Chicago Style (17a ed.)

Attenborough, David. Discovering Life on Earth: A Natural History. London: Collins, 1992.

Cita MLA (9a ed.)

Attenborough, David. Discovering Life on Earth: A Natural History. Collins, 1992.