BONNER, W. N. (1990). The natural history of seals. Facts on File.
Citación estilo ChicagoBONNER, W. Nigel. The Natural History of Seals. New York: Facts on File, 1990.
Cita MLABONNER, W. Nigel. The Natural History of Seals. Facts on File, 1990.
Warning: These citations may not always be 100% accurate.