Revolution Studios, Dark Horse Entertainment (Firm), Columbia TriStar Home Entertainment (Firm), Gordon, L., Richardson, M., Levin, L., . . . Mignola, M. Hellboy (Special ed.).
Cita Chicago (17th ed.)Revolution Studios, et al. Hellboy. Special ed.
Cita MLA (9th ed.)Revolution Studios, et al. Hellboy. Special ed.
Atenció: Aquestes cites poden no estar 100% correctes.