APA (7th ed.) Citation

Groening, M. (1991). Will and Abe's guide to the universe. Harper.

Chicago Style (17th ed.) Citation

Groening, Matt. Will and Abe's Guide to the Universe. New York: Harper, 1991.

MLA (9th ed.) Citation

Groening, Matt. Will and Abe's Guide to the Universe. Harper, 1991.

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