APA (7th ed.) Citation

Zahrobsky, G., Kormondy, E. J., & Essenfeld, B. E. (1998). Biology: A systems approach. Addison-Wesley.

Chicago Style (17th ed.) Citation

Zahrobsky, George, Edward J. Kormondy, and Bernice E. Essenfeld. Biology: A Systems Approach. Menlo Park, CA: Addison-Wesley, 1998.

MLA (9th ed.) Citation

Zahrobsky, George, et al. Biology: A Systems Approach. Addison-Wesley, 1998.