Παραπομπή APA
Salvatore, D., & Diulio, E. A. (1980). Schaum's outline of theory and problems of principles of economics. New York: McGraw-Hill.
Παραπομπή Chicago StyleSalvatore, Dominick., and Eugene A. Diulio. Schaum's Outline of Theory and Problems of Principles of Economics. New York: McGraw-Hill, 1980.
Παραπομπή MLASalvatore, Dominick., and Eugene A. Diulio. Schaum's Outline of Theory and Problems of Principles of Economics. New York: McGraw-Hill, 1980.
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