APA (7th ed.) Citation

Library Pass, LLC, Casey, J., & Giffen, . K. (2011). What Were They Thinking?: Monster Mash Up. BOOM! Studios.

Chicago Style (17th ed.) Citation

Library Pass, LLC, Joe Casey, and Keith Giffen. What Were They Thinking?: Monster Mash Up. [United States]: BOOM! Studios, 2011.

MLA (9th ed.) Citation

Library Pass, LLC, et al. What Were They Thinking?: Monster Mash Up. BOOM! Studios, 2011.