Rugg, H. (1929). An introduction to American civilization: A study of economic life in the United States. Ginn and Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRugg, Harold. An Introduction to American Civilization: A Study of Economic Life in the United States. Boston: Ginn and Company, 1929.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRugg, Harold. An Introduction to American Civilization: A Study of Economic Life in the United States. Ginn and Company, 1929.
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