Isadora, R. (2009). Happy belly, happy smile. Harcourt Children's Books.
芝加哥风格引文Isadora, Rachel. Happy Belly, Happy Smile. Boston: Harcourt Children's Books, 2009.
MLA引文Isadora, Rachel. Happy Belly, Happy Smile. Harcourt Children's Books, 2009.
警告：这些引文格式不一定是100％准确.