APA (7th ed.) Citation

Morris, D., & Hartas, L. (2004). The art of game worlds / Dave Morris & Leo Hartas. Harper Design International.

Chicago Style (17th ed.) Citation

Morris, Dave, and Leo Hartas. The Art of Game Worlds / Dave Morris & Leo Hartas. New York: Harper Design International, 2004.

MLA (9th ed.) Citation

Morris, Dave, and Leo Hartas. The Art of Game Worlds / Dave Morris & Leo Hartas. Harper Design International, 2004.

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