APA (7th ed.) Citation

Doyle, A. C. (2019). The valley of fear. Dover Publications, Inc..

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan. The Valley of Fear. Mineola, New York: Dover Publications, Inc., 2019.

MLA (9th ed.) Citation

Doyle, Arthur Conan. The Valley of Fear. Dover Publications, Inc., 2019.

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