APA (7th ed.) Citation

Keene, C. (1972). The message in the hollow oak (12). Grosset & Dunlap.

Chicago Style (17th ed.) Citation

Keene, Carolyn. The Message in the Hollow Oak (12). New York: Grosset & Dunlap, 1972.

MLA (9th ed.) Citation

Keene, Carolyn. The Message in the Hollow Oak (12). Grosset & Dunlap, 1972.

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