Dyfyniad APA
Walker, S., & Katz, C. M. (2005). The police in America: An introduction (5th ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Walker, Samuel, and Charles M. Katz. The Police in America: An Introduction. 5th ed. New York: McGraw-Hill, 2005.
Dyfyniad MLA
Walker, Samuel, and Charles M. Katz. The Police in America: An Introduction. 5th ed. McGraw-Hill, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.