Keith, N. W., & Keith, N. Z. (1988). New perspectives on social class and socioeconomic development in the periphery. Greenwood Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKeith, Nelson W., और Novella Zett Keith. New Perspectives on Social Class and Socioeconomic Development in the Periphery. New York: Greenwood Press, 1988.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKeith, Nelson W., और Novella Zett Keith. New Perspectives on Social Class and Socioeconomic Development in the Periphery. Greenwood Press, 1988.
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