Cogan. Union and States' Rights. The University of Akron Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCogan. Union and States' Rights. The University of Akron Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCogan. Union and States' Rights. The University of Akron Press.
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