APA (7e ed.) Bronvermelding

York, M. J., & Idle, M. S. (2013). The three billy goats gruff. Child's World.

Chicago (17e ed.) Bronvermelding

York, M. J., en Molly Schaar Idle. The Three Billy Goats Gruff. Mankato, MN: Child's World, 2013.

MLA (8e ed.) Bronvermelding

York, M. J., en Molly Schaar Idle. The Three Billy Goats Gruff. Child's World, 2013.