APA (7th ed.) Citation

Keene, C. (1959). The hidden staircase. Grosset & Dunlap.

Chicago Style (17th ed.) Citation

Keene, Carolyn. The Hidden Staircase. New York: Grosset & Dunlap, 1959.

MLA (9th ed.) Citation

Keene, Carolyn. The Hidden Staircase. Grosset & Dunlap, 1959.

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