Cita APA (7a ed.)

Doyle, A. C., Smith, A. E., & Linton, A. (1961). The sign of four. Murray.

Cita Chicago Style (17a ed.)

Doyle, Arthur Conan, A. E. Smith, y Anne Linton. The Sign of Four. London: Murray, 1961.

Cita MLA (9a ed.)

Doyle, Arthur Conan, et al. The Sign of Four. Murray, 1961.