B., H., D., R., L., N.(1980).Trends in american electoral behavior / David B. Hill, Norman R. Luthbeg (Cet.1).New York:F.E. Peacock Publishing, Inc.
Gaya MLA
Hill, David, B.., Luttbeg, Norman, R.."Trends in american electoral behavior / David B. Hill, Norman R. Luthbeg".Cet.1New York:F.E. Peacock Publishing, Inc,1980.Skripsi.