Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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