APA (7th ed.) Citation

Keene. (1930). The hidden staircase. Grosset & Dunlap.

Chicago Style (17th ed.) Citation

Keene. The Hidden Staircase. New York: Grosset & Dunlap, 1930.

MLA (8th ed.) Citation

Keene. The Hidden Staircase. Grosset & Dunlap, 1930.

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