Usher. Making News at The New York Times. University of Michigan Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUsher. Making News at The New York Times. University of Michigan Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUsher. Making News at The New York Times. University of Michigan Press.
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