APA (7th ed.) Citation

Holub, J., & Di Vito, A. (2004). Why do birds sing? Dial Books for Young Readers.

Chicago Style (17th ed.) Citation

Holub, Joan, and Anna Di Vito. Why Do Birds Sing? New York: Dial Books for Young Readers, 2004.

MLA (9th ed.) Citation

Holub, Joan, and Anna Di Vito. Why Do Birds Sing? Dial Books for Young Readers, 2004.

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