APA (7th ed.) Citation

Doyle, A. C., & Edwards, O. D. (1994). The valley of fear. Oxford University Press.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan, and Owen Dudley Edwards. The Valley of Fear. Oxford [England] ; New York: Oxford University Press, 1994.

MLA (9th ed.) Citation

Doyle, Arthur Conan, and Owen Dudley Edwards. The Valley of Fear. Oxford University Press, 1994.