APA (7th ed.) Citation

O'Toole, C. (1986). The encyclopedia of insects. Facts on File.

Chicago Style (17th ed.) Citation

O'Toole, Christopher. The Encyclopedia of Insects. New York: Facts on File, 1986.

MLA (9th ed.) Citation

O'Toole, Christopher. The Encyclopedia of Insects. Facts on File, 1986.

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