APA (7th ed.) Citation

Moore, A., Gibbons, D., & Higgins, J. (2007). Watchmen / Alan Moore, writer ; Dave Gibbons, illustrator/letterer ; John Higgins, colorist. Titan Books.

Chicago Style (17th ed.) Citation

Moore, Alan, Dave Gibbons, and John Higgins. Watchmen / Alan Moore, Writer ; Dave Gibbons, Illustrator/letterer ; John Higgins, Colorist. London: Titan Books, 2007.

MLA (9th ed.) Citation

Moore, Alan, et al. Watchmen / Alan Moore, Writer ; Dave Gibbons, Illustrator/letterer ; John Higgins, Colorist. Titan Books, 2007.

Warning: These citations may not always be 100% accurate.