APA-viite (7. p.)

World Book, Inc. (2007). The Digestive system, the urinary system. World Book.

Chicago-viite (17. p.)

World Book, Inc. The Digestive System, the Urinary System. Chicago, Ill: World Book, 2007.

MLA-viite (9. p.)

World Book, Inc. The Digestive System, the Urinary System. World Book, 2007.