APA (7th ed.) Citation

Duncan, C. D., & Pickwell, G. B. (1939). The world of insects. McGraw-Hill book company, inc..

Chicago Style (17th ed.) Citation

Duncan, Carl D., and Gayle Benjamin Pickwell. The World of Insects. New York, London: McGraw-Hill book company, inc., 1939.

MLA (9th ed.) Citation

Duncan, Carl D., and Gayle Benjamin Pickwell. The World of Insects. McGraw-Hill book company, inc., 1939.