Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

Warning: These citations may not always be 100% accurate.