.Pindyck, R. S., & .Rubinfeld, D. L. (1981). Econometric models and economic forecasts (2d ed.). McGraw-Hill.

.Pindyck, Robert S., and Daniel L. .Rubinfeld. Econometric Models and Economic Forecasts. 2d ed. New York: McGraw-Hill, 1981.

.Pindyck, Robert S., and Daniel L. .Rubinfeld. Econometric Models and Economic Forecasts. 2d ed. McGraw-Hill, 1981.