Loether, H. J. (1975). Problems of aging: Sociological and social psychological perspectives (2d ed.). Dickenson Pub. Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLoether, Herman J. Problems of Aging: Sociological and Social Psychological Perspectives. 2d ed. Dickenson Pub. Co., 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLoether, Herman J. Problems of Aging: Sociological and Social Psychological Perspectives. 2d ed. Dickenson Pub. Co., 1975.
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