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 Style

Salvatore, Dominick, and Eugene A. Diulio. Schaum's Outline of Theory and Problems of Principles of Economics. New York: McGraw-Hill, 1980.

Παραπομπή MLA

Salvatore, 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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