York, M. J., & Idle, M. S. (2013). The three billy goats gruff. Child's World.
芝加哥风格引文York, M. J., 与 Molly Schaar Idle. The Three Billy Goats Gruff. Mankato, MN: Child's World, 2013.
MLA引文York, M. J., 与 Molly Schaar Idle. The Three Billy Goats Gruff. Child's World, 2013.
警告：这些引文格式不一定是100％准确.