APA (7th ed.) Citation

Library Pass, LLC, Evanier , M., & Various. (2016). Groo: Hell on Earth. Dark Horse.

Chicago Style (17th ed.) Citation

Library Pass, LLC, Mark Evanier , and Various. Groo: Hell on Earth. [United States]: Dark Horse, 2016.

MLA (9th ed.) Citation

Library Pass, LLC, et al. Groo: Hell on Earth. Dark Horse, 2016.