APA Style

Stilton, T. et al (2012). Geronimo Stilton : Thea Stilton AND THE PRINCE'S EMERALD . New York: Scholastic Inc..

MLA Style

Stilton, Thea. et al. "Geronimo Stilton : Thea Stilton AND THE PRINCE'S EMERALD". New York: Scholastic Inc., 2012. Text.