Ross, J. F., & Herrmann, E. (2014). Enduring courage: Ace pilot Eddie Rickenbacker and the dawn of the age of speed (Unabridged.). Macmillan Audio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoss, John F., और Edward Herrmann. Enduring Courage: Ace Pilot Eddie Rickenbacker and the Dawn of the Age of Speed. Unabridged. New York, NY: Macmillan Audio, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRoss, John F., और Edward Herrmann. Enduring Courage: Ace Pilot Eddie Rickenbacker and the Dawn of the Age of Speed. Unabridged. Macmillan Audio, 2014.
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