United States. National Park Service. Fort Sumter: Anvil of War Fort Sumter National Monument, South Carolina.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. National Park Service. Fort Sumter: Anvil of War Fort Sumter National Monument, South Carolina.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited States. National Park Service. Fort Sumter: Anvil of War Fort Sumter National Monument, South Carolina.
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