APA Style

Keene, C. (2015). The Secret of Red Gate Farm (Nancy Drew #6) . New York, USA: Grosset & Dunlap (Penguin Young Readers Group).

MLA Style

Keene, Carolyn. "The Secret of Red Gate Farm (Nancy Drew #6)". New York, USA: Grosset & Dunlap (Penguin Young Readers Group), 2015. Printed Book.