APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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