Cita APA (7th ed.)

Enger, E. D., Kormelink, J. R., Ross, F. S., & Smith, R. J. (1994). Concepts in biology (7th ed.). WCBrown.

Cita Chicago (17th ed.)

Enger, Eldon D., J. Richard Kormelink, Frederick S. Ross, i Rodney J. Smith. Concepts in Biology. 7th ed. Dubuque, IA: WCBrown, 1994.

Cita MLA (9th ed.)

Enger, Eldon D., et al. Concepts in Biology. 7th ed. WCBrown, 1994.