APA Style

Keene, C., Pamintuan, M. (2007). Nancy Drew and the Clue Crew #9: The Halloween Hoax . New York: Aladdin Paperbacks.

MLA Style

Keene, Carolyn., Pamintuan, Macky. "Nancy Drew and the Clue Crew #9: The Halloween Hoax". New York: Aladdin Paperbacks, 2007. Text.