APA (7th ed.) Citation

Doyle, A. C. (1926). The valley of fear. John Murray.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan. The Valley of Fear. London: John Murray, 1926.

MLA (8th ed.) Citation

Doyle, Arthur Conan. The Valley of Fear. John Murray, 1926.

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