APA (7th ed.) Citation

Purdom, P. W. (1980). Environmental health (2nd ed.). Academic Press.

Chicago Style (17th ed.) Citation

Purdom, P. Walton. Environmental Health. 2nd ed. New York: Academic Press, 1980.

MLA (9th ed.) Citation

Purdom, P. Walton. Environmental Health. 2nd ed. Academic Press, 1980.