Gottheil, F. M. (1996). Principles of economics. South-Western College.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGottheil, Fred M. Principles of Economics. Illinois: South-Western College, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGottheil, Fred M. Principles of Economics. South-Western College, 1996.
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