APA (7th ed.) Citation

Simon, S. (2005). Guts: Our digestive system. HarperCollins.

Chicago Style (17th ed.) Citation

Simon, Seymour. Guts: Our Digestive System. New York, NY: HarperCollins, 2005.

MLA (9th ed.) Citation

Simon, Seymour. Guts: Our Digestive System. HarperCollins, 2005.

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