APA (7 वां संस्करण) प्रशस्ति पत्र
Hagen, E. E. (1962). On the theory of social change: How economic growth begins : a study from the Center for International Studies, Massachusetts Institute of Technology. Dorsey Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Hagen, Everett Einar. On the Theory of Social Change: How Economic Growth Begins : A Study from the Center for International Studies, Massachusetts Institute of Technology. Homewood, Illinois: Dorsey Press, 1962.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Hagen, Everett Einar. On the Theory of Social Change: How Economic Growth Begins : A Study from the Center for International Studies, Massachusetts Institute of Technology. Dorsey Press, 1962.
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