APA (7th ed.) Citation

Keene, C. (1996). The Mystery of the 99 steps. Grosset & Dunlap Publisher.

Chicago Style (17th ed.) Citation

Keene, Carolyn. The Mystery of the 99 Steps. New York: Grosset & Dunlap Publisher, 1996.

MLA (9th ed.) Citation

Keene, Carolyn. The Mystery of the 99 Steps. Grosset & Dunlap Publisher, 1996.

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