APA (7th ed.) Citation

Curtis, H., & Barnes, N. S. (1989). Biology (5th ed.). Worth.

Chicago Style (17th ed.) Citation

Curtis, Helena, and N. Sue Barnes. Biology. 5th ed. New York, N.Y.: Worth, 1989.

MLA (9th ed.) Citation

Curtis, Helena, and N. Sue Barnes. Biology. 5th ed. Worth, 1989.