ChambersJohn C., MullickSalinder K., and SmithDonald D.“How to Choose the Right Forecasting Technique,”Harvard Business Review, 49(July–August 1971), 71–2.
2.
GreenPaul, and TullDonald S.Research for Marketing Decision, 3rd edition. Englewood Cliffs, New Jersey: Prentice-Hall, Inc., 1975.
3.
SiegalSidney. Nonparametric Statistics.New York: McGraw-Hill Book Company, 1956.
