Trimble, L., & Dronfield, J. (2015). Beyond the call: The true story of one World War II pilot's covert mission to rescue POWs on the Eastern Front (First edition.). Berkley Caliber.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTrimble, Lee, और Jeremy Dronfield. Beyond the Call: The True Story of One World War II Pilot's Covert Mission to Rescue POWs on the Eastern Front. First edition. New York: Berkley Caliber, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTrimble, Lee, और Jeremy Dronfield. Beyond the Call: The True Story of One World War II Pilot's Covert Mission to Rescue POWs on the Eastern Front. First edition. Berkley Caliber, 2015.
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