APA (7th ed.) Citation

Purdon, W. P., & Gabriel, K. L. (1971). Environmental health. Academic Press.

Chicago Style (17th ed.) Citation

Purdon, Walton P., and Karl L. Gabriel. Environmental Health. New York: Academic Press, 1971.

MLA (9th ed.) Citation

Purdon, Walton P., and Karl L. Gabriel. Environmental Health. Academic Press, 1971.

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