APA (7th ed.) Citation

Enger, E. D., & Ross, F. C. (2005). Concepts in Biology (20th ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Enger, Eldon D., and Frederick C. Ross. Concepts in Biology. 20th ed. Boston, New York: McGraw-Hill, 2005.

MLA (9th ed.) Citation

Enger, Eldon D., and Frederick C. Ross. Concepts in Biology. 20th ed. McGraw-Hill, 2005.