Porter. Their Lives, Their Wills. Texas Tech University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPorter. Their Lives, Their Wills. Texas Tech University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPorter. Their Lives, Their Wills. Texas Tech University Press.
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