Cita APA (7a ed.)

Conan Doyle, A., & Tull, P. (1986). The valley of fear (Unabridged.). Recorded Books Inc..

Cita Chicago Style (17a ed.)

Conan Doyle, Arthur, y Patrick Tull. The Valley of Fear. Unabridged. Prince Frederick: Recorded Books Inc., 1986.

Cita MLA (8a ed.)

Conan Doyle, Arthur, y Patrick Tull. The Valley of Fear. Unabridged. Recorded Books Inc., 1986.

Precaución: Estas citas no son 100% exactas.