Cita APA (7a ed.)

Koontz, D. R. (1979). The key to midnight. Berkley Books.

Cita Chicago Style (17a ed.)

Koontz, Dean R. The Key to Midnight. New York, NY: Berkley Books, 1979.

Cita MLA (9a ed.)

Koontz, Dean R. The Key to Midnight. Berkley Books, 1979.