APA (7th ed.) Citation

Stilton, G., & Ferrario, G. (2009). Geronimo's valentine. Scholastic.

Chicago Style (17th ed.) Citation

Stilton, Geronimo, and Giuseppe Ferrario. Geronimo's Valentine. New York: Scholastic, 2009.

MLA (8th ed.) Citation

Stilton, Geronimo, and Giuseppe Ferrario. Geronimo's Valentine. Scholastic, 2009.

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