APA Style

Stilton, G., Salfo, F. (2011). Geronimo Stilton : play it again, Mozart! . New York, USA: Papercutz.

MLA Style

Stilton, Geronimo., Salfo, Federica. "Geronimo Stilton : play it again, Mozart!". New York, USA: Papercutz, 2011. Text.