APA (7th ed.) Citation

Keene, C. (1959). The secret of the old clock. Grosset & Dunlap.

Chicago Style (17th ed.) Citation

Keene, Carolyn. The Secret of the Old Clock. New York: Grosset & Dunlap, 1959.

MLA (9th ed.) Citation

Keene, Carolyn. The Secret of the Old Clock. Grosset & Dunlap, 1959.