Lua APA (7ú heag.)
Doyle, A. C., & Edwards, O. D. (1994). The valley of fear. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)
Doyle, Arthur Conan, agus Owen Dudley Edwards. The Valley of Fear. Oxford [England] ; New York: Oxford University Press, 1994.
Lua MLA (9ú heag.)
Doyle, Arthur Conan, agus Owen Dudley Edwards. The Valley of Fear. Oxford University Press, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.