APA (7th ed.) Citation

Baum, D. (2013). Gun guys: A road trip. [publisher not identified].

Chicago Style (17th ed.) Citation

Baum, Dan. Gun Guys: A Road Trip. [Place of publication not identified]: [publisher not identified], 2013.

MLA (8th ed.) Citation

Baum, Dan. Gun Guys: A Road Trip. [publisher not identified], 2013.