APA (7th ed.) Citation

Curtis, H. (1983). Biology (4th ed.). Worth Publishers.

Chicago Style (17th ed.) Citation

Curtis, Helena. Biology. 4th ed. New York, NY: Worth Publishers, 1983.

MLA (9th ed.) Citation

Curtis, Helena. Biology. 4th ed. Worth Publishers, 1983.

Warning: These citations may not always be 100% accurate.