APA (7th ed.) Citation

Doyle, S. A. C. The sign of the four: A novel. Street & Smith.

Chicago Style (17th ed.) Citation

Doyle, Sir Arthur Conan. The Sign of the Four: A Novel. New York: Street & Smith.

MLA (9th ed.) Citation

Doyle, Sir Arthur Conan. The Sign of the Four: A Novel. Street & Smith.