APA (7th ed.) Citation

Ziefert, H., & Smith, M. (1993). Harry takes a bath. Puffin Books.

Chicago Style (17th ed.) Citation

Ziefert, Harriet, and Mavis Smith. Harry Takes a Bath. New York: Puffin Books, 1993.

MLA (8th ed.) Citation

Ziefert, Harriet, and Mavis Smith. Harry Takes a Bath. Puffin Books, 1993.