APA (7th ed.) Citation

Smith, M. E., & Morton, D. G. (2001). The digestive system. Churchill Livingstone.

Chicago Style (17th ed.) Citation

Smith, Margaret E., and Dion G. Morton. The Digestive System. Edinburgh: Churchill Livingstone, 2001.

MLA (9th ed.) Citation

Smith, Margaret E., and Dion G. Morton. The Digestive System. Churchill Livingstone, 2001.