APA (7th ed.) Citation

Doyle, A. C., & Keller, A. I. (1917). The valley of fear: A Sherlock Holmes novel. A.L. Burt Company.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan, and Arthur Ignatius Keller. The Valley of Fear: A Sherlock Holmes Novel. New York: A.L. Burt Company, 1917.

MLA (9th ed.) Citation

Doyle, Arthur Conan, and Arthur Ignatius Keller. The Valley of Fear: A Sherlock Holmes Novel. A.L. Burt Company, 1917.