Cita APA (7a ed.)

Walker, S. (1977). A critical history of police reform: The emergence of professionalism. Lexington Books.

Cita Chicago Style (17a ed.)

Walker, Samuel. A Critical History of Police Reform: The Emergence of Professionalism. Lexington, Mass. [u.a.]: Lexington Books, 1977.

Cita MLA (8a ed.)

Walker, Samuel. A Critical History of Police Reform: The Emergence of Professionalism. Lexington Books, 1977.