Richter, M. (1970). Essays in theory and history: An approach to the social sciences. Harvard University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRichter, Melvin. Essays in Theory and History: An Approach to the Social Sciences. Harvard University Press, 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRichter, Melvin. Essays in Theory and History: An Approach to the Social Sciences. Harvard University Press, 1970.
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