Killebrew. The Royal Air Force in American Skies. University of North Texas Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKillebrew. The Royal Air Force in American Skies. University of North Texas Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKillebrew. The Royal Air Force in American Skies. University of North Texas Press.
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