Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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