Cita APA (7th ed.)

Berger, T. (1991). Changing the past: A novel. Penguin Books.

Cita Chicago (17th ed.)

Berger, Thomas. Changing the Past: A Novel. New York, N.Y., U.S.A.: Penguin Books, 1991.

Cita MLA (9th ed.)

Berger, Thomas. Changing the Past: A Novel. Penguin Books, 1991.