APA (7th ed.) Citation

Lee, S., Kirby, J., López, U., & Fonseca, R. The X-Men.

Chicago Style (17th ed.) Citation

Lee, Stan, Jack Kirby, Uriel López, and Raimon Fonseca. The X-Men. Madrid.

MLA (9th ed.) Citation

Lee, Stan, et al. The X-Men.