APA (7th ed.) Citation

Ellis, B. E. (1991). American psycho: A novel (1. ed.). Vintage Books.

Chicago Style (17th ed.) Citation

Ellis, Bret Easton. American Psycho: A Novel. 1. ed. New York: Vintage Books, 1991.

MLA (9th ed.) Citation

Ellis, Bret Easton. American Psycho: A Novel. 1. ed. Vintage Books, 1991.