Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.