Salvatore, D., & Reagle, D. P. (2002). Schaum's outline of theory and problems of statistics and econometrics (2nd ed.). McGraw-Hill.

Salvatore, Dominick, and Derrick P. Reagle. Schaum's Outline of Theory and Problems of Statistics and Econometrics. 2nd ed. New York: McGraw-Hill, 2002.

Salvatore, Dominick, and Derrick P. Reagle. Schaum's Outline of Theory and Problems of Statistics and Econometrics. 2nd ed. McGraw-Hill, 2002.