Bone, H. A., & Ranney, A. (1976). Politics and Voters (4th ed.). McGraw-Hill.
Dyfyniad Arddull ChicagoBone, Hugh A., and Austin Ranney. Politics and Voters. 4th ed. New York: McGraw-Hill, 1976.
Dyfyniad MLABone, Hugh A., and Austin Ranney. Politics and Voters. 4th ed. McGraw-Hill, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.