APA (7th ed.) Citation

O'Brien, Chafetz, & Evans. (1991). The encyclopedia of alcoholism (2nd ed.). Facts on File.

Chicago Style (17th ed.) Citation

O'Brien, Chafetz, and Evans. The Encyclopedia of Alcoholism. 2nd ed. New York: Facts on File, 1991.

MLA (9th ed.) Citation

O'Brien, et al. The Encyclopedia of Alcoholism. 2nd ed. Facts on File, 1991.