APA (7th ed.) Citation

Grunewald, M., Mantlo, B., & Grant, S. Marvel super hero contest of champions! Marvel Comics Group.

Chicago Style (17th ed.) Citation

Grunewald, Mark, Bill Mantlo, and Steven Grant. Marvel Super Hero Contest of Champions! New York, NY: Marvel Comics Group.

MLA (9th ed.) Citation

Grunewald, Mark, et al. Marvel Super Hero Contest of Champions! Marvel Comics Group.