APA (7th ed.) Citation

Keller, H. (2003). What a hat! Greenwillow Books.

Chicago Style (17th ed.) Citation

Keller, Holly. What a Hat! New York: Greenwillow Books, 2003.

MLA (8th ed.) Citation

Keller, Holly. What a Hat! Greenwillow Books, 2003.

Warning: These citations may not always be 100% accurate.