APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Smith, Margaret, and Dion Morton. The Digestive System. Edinburgh ; New York: Churchill Livingstone, 2001.

MLA (9th ed.) Citation

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