Byer, G. C. J. (1999). Charlemagne and baptism: A study of responses to the circular letter of 811/812. International Scholars Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रByer, Glenn C. J. Charlemagne and Baptism: A Study of Responses to the Circular Letter of 811/812. San Francisco: International Scholars Publications, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रByer, Glenn C. J. Charlemagne and Baptism: A Study of Responses to the Circular Letter of 811/812. International Scholars Publications, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.