APA (7th ed.) Citation

Riddle, J. T. E., & Stewart, E. M. (1989). The digestive system and the urinary system. Churchill Livingstone.

Chicago Style (17th ed.) Citation

Riddle, Janet T. E., and Elizabeth M. Stewart. The Digestive System and the Urinary System. Edinburgh, Scotland: Churchill Livingstone, 1989.

MLA (9th ed.) Citation

Riddle, Janet T. E., and Elizabeth M. Stewart. The Digestive System and the Urinary System. Churchill Livingstone, 1989.