Ogg, F. A. 1., & Ray, P. O. (1951). Introduction to American government (10th ed.). Appleton-Century-Crofts.
Dyfyniad Arddull ChicagoOgg, Frederick Austin 1878, and Perley Orman Ray. Introduction to American Government. 10th ed. New York: Appleton-Century-Crofts, 1951.
Dyfyniad MLAOgg, Frederick Austin 1878, and Perley Orman Ray. Introduction to American Government. 10th ed. Appleton-Century-Crofts, 1951.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.