APA (7th ed.) Citation

Knight, N., & Kripke, E. (2007). Supernatural: The official companion. Titan.

Chicago Style (17th ed.) Citation

Knight, Nicholas, and Eric Kripke. Supernatural: The Official Companion. London: Titan, 2007.

MLA (9th ed.) Citation

Knight, Nicholas, and Eric Kripke. Supernatural: The Official Companion. Titan, 2007.

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