Cita APA (7th ed.)

Gardner, E. S. (1947). The clue of the forgotten murder. Pocket Books.

Cita Chicago (17th ed.)

Gardner, Erle Stanley. The Clue of the Forgotten Murder. Nueva York: Pocket Books, 1947.

Cita MLA (9th ed.)

Gardner, Erle Stanley. The Clue of the Forgotten Murder. Pocket Books, 1947.