Cita APA (7a ed.)

Walker, S. (1992). The police in America: An introduction (2nd ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Walker, Samuel. The Police in America: An Introduction. 2nd ed. New York: McGraw-Hill, 1992.

Cita MLA (8a ed.)

Walker, Samuel. The Police in America: An Introduction. 2nd ed. McGraw-Hill, 1992.