APA (7th ed.) Citation

Hopson, J. L., & Wessells, N. K. (1990). Essential of Biology. McGraw-hill publishing company.

Chicago Style (17th ed.) Citation

Hopson, Janet L., and Norman K. Wessells. Essential of Biology. New York: McGraw-hill publishing company, 1990.

MLA (9th ed.) Citation

Hopson, Janet L., and Norman K. Wessells. Essential of Biology. McGraw-hill publishing company, 1990.