Cita APA (7a ed.)

Cooper, J. L. (1981). You can hear them knocking: A study in the policing of America. Kennikat Press.

Cita Chicago Style (17a ed.)

Cooper, John L. You Can Hear Them Knocking: A Study in the Policing of America. Port Washington, N.Y: Kennikat Press, 1981.

Cita MLA (9a ed.)

Cooper, John L. You Can Hear Them Knocking: A Study in the Policing of America. Kennikat Press, 1981.