Sypeck, J. (2007). Becoming Charlemagne: Europe, Baghdad, and the empires of A.D. 800 (1st Harper Perennial ed.). Harper Perennial.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSypeck, Jeff. Becoming Charlemagne: Europe, Baghdad, and the Empires of A.D. 800. 1st Harper Perennial ed. New York: Harper Perennial, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSypeck, Jeff. Becoming Charlemagne: Europe, Baghdad, and the Empires of A.D. 800. 1st Harper Perennial ed. Harper Perennial, 2007.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.