APA (7th ed.) Citation

Warner, P. (2011). The secret of the skeleton key: Case #1. Egmont USA.

Chicago Style (17th ed.) Citation

Warner, Penny. The Secret of the Skeleton Key: Case #1. New York: Egmont USA, 2011.

MLA (9th ed.) Citation

Warner, Penny. The Secret of the Skeleton Key: Case #1. Egmont USA, 2011.

Warning: These citations may not always be 100% accurate.