APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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