APA (7th ed.) Citation

Doyle, A. C. (1909). A duet: A duologue. S. French.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan. A Duet: A Duologue. London ; New York: S. French, 1909.

MLA (8th ed.) Citation

Doyle, Arthur Conan. A Duet: A Duologue. S. French, 1909.