APA (7th ed.) Citation

Spinelli, E., & Winstead, R. (2007). Someday. Dial Books for Young Readers.

Chicago Style (17th ed.) Citation

Spinelli, Eileen, and Rosie Winstead. Someday. New York: Dial Books for Young Readers, 2007.

MLA (8th ed.) Citation

Spinelli, Eileen, and Rosie Winstead. Someday. Dial Books for Young Readers, 2007.