APA引文

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

芝加哥风格引文

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

MLA引文

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