Gaya APA

Stilton, G. (2005). Geronimo Stilton 20: Surf's Up, Geronimo! . New York: Scholastic Inc..

Gaya MLA

Stilton, Geronimo. "Geronimo Stilton 20: Surf's Up, Geronimo!". New York: Scholastic Inc., 2005. Text / Book.