APA (7th ed.) Citation

Koontz, D. R. (1989). The key to midnight: A novel (1st hardcover ed.). Dark Harvest.

Chicago Style (17th ed.) Citation

Koontz, Dean R. The Key to Midnight: A Novel. 1st hardcover ed. Arlington Hts., Ill.: Dark Harvest, 1989.

MLA (8th ed.) Citation

Koontz, Dean R. The Key to Midnight: A Novel. 1st hardcover ed. Dark Harvest, 1989.