(1) Wooldridge, J.M. (2000), “Introductory Econometrics: A Modern Approach”, South Western Publishers.
(2) Gujarati, D. (2003), “Basic Econometrics”, 4th ed., McGraw-Hill International Editions.
(3) Pindyck, R. S. and Rubinfeld, D. L. (1998), “Econometric Models and Economic Forecasts”, McGraw-Hill
International Editions.
(4) Murteira, B., Ribeiro, C.S., Silva, J.A. e Pimenta, C. (2007), “Introdução à Estatística”, 2.ª ed., McGraw-Hill de
Portugal.
(5) Sincich, T. (1996). “Business Statistics by Example”, 5th ed., Prentice-Hall International Editions.