Cita APA

BONNER, W. N. (1990). The natural history of seals. Facts on File.

Citación estilo Chicago

BONNER, W. Nigel. The Natural History of Seals. New York: Facts on File, 1990.

Cita MLA

BONNER, W. Nigel. The Natural History of Seals. Facts on File, 1990.

Warning: These citations may not always be 100% accurate.