APA (7th ed.) Citation

Brown, M. W., & Katz, K. (2010). Sleepy ABC. Harper.

Chicago Style (17th ed.) Citation

Brown, Margaret Wise, and Karen Katz. Sleepy ABC. New York: Harper, 2010.

MLA (8th ed.) Citation

Brown, Margaret Wise, and Karen Katz. Sleepy ABC. Harper, 2010.