Palmer, G. L. (1956). Philadelphia workers in a changing economy. University of Pennsylvania Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPalmer, Gladys Louise. Philadelphia Workers in a Changing Economy. Philadelphia: University of Pennsylvania Press, 1956.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPalmer, Gladys Louise. Philadelphia Workers in a Changing Economy. University of Pennsylvania Press, 1956.
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