APA (7th ed.) Citation

Keene. (1968). The spider sapphire mystery. Grosset & Dunlap.

Chicago Style (17th ed.) Citation

Keene. The Spider Sapphire Mystery. New York: Grosset & Dunlap, 1968.

MLA (8th ed.) Citation

Keene. The Spider Sapphire Mystery. Grosset & Dunlap, 1968.

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