Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.