APA (7th ed.) Citation

Keene. (1935). The message in the hollow oak. Grosset and Dunlap.

Chicago Style (17th ed.) Citation

Keene. The Message in the Hollow Oak. New York: Grosset and Dunlap, 1935.

MLA (8th ed.) Citation

Keene. The Message in the Hollow Oak. Grosset and Dunlap, 1935.

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