APA (7th ed.) Citation

Gray, P. (1970). The encyclopedia of the biological sciences (2d ed.). Van Nostrand Reinhold Co.

Chicago Style (17th ed.) Citation

Gray, Peter. The Encyclopedia of the Biological Sciences. 2d ed. New York: Van Nostrand Reinhold Co, 1970.

MLA (9th ed.) Citation

Gray, Peter. The Encyclopedia of the Biological Sciences. 2d ed. Van Nostrand Reinhold Co, 1970.