Dyfyniad APA

Walker, S., & Katz, C. M. (2005). The police in America: An introduction (5th ed.). New York: 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. New York: McGraw-Hill, 2005.

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