Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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