APA (7th ed.) Citation

Doyle, A. C. (1974). The sign of four. J. Murray ; J. Cape.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan. The Sign of Four. London: J. Murray ; J. Cape, 1974.

MLA (9th ed.) Citation

Doyle, Arthur Conan. The Sign of Four. J. Murray ; J. Cape, 1974.