APA (7th ed.) Citation

Geronimo Stilton. (2019). Geronimo Stilton Secret Agent (2008.). Scholastic Publications.

Chicago Style (17th ed.) Citation

Geronimo Stilton. Geronimo Stilton Secret Agent. 2008. Scholastic Publications, 2019.

MLA (9th ed.) Citation

Geronimo Stilton. Geronimo Stilton Secret Agent. 2008. Scholastic Publications, 2019.

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