APA (7th ed.) Citation

Ellis, B. E. (1991). American psycho: A novel. Vintage Books, a division of Random House, Inc..

Chicago Style (17th ed.) Citation

Ellis, Bret Easton. American Psycho: A Novel. New York: Vintage Books, a division of Random House, Inc., 1991.

MLA (8th ed.) Citation

Ellis, Bret Easton. American Psycho: A Novel. Vintage Books, a division of Random House, Inc., 1991.

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