Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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