APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.