Perna. Preparing Today's Students for Tomorrow's Jobs in Metropolitan America. University of Pennsylvania Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPerna. Preparing Today's Students for Tomorrow's Jobs in Metropolitan America. University of Pennsylvania Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPerna. Preparing Today's Students for Tomorrow's Jobs in Metropolitan America. University of Pennsylvania Press.
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