“Gregory the Great and the New Power of the Franks.” The Middle Ages, by Johannes Fried and Peter Lewis, Harvard University Press, Cambridge, Massachusetts; London, England, 2015, pp. 23–43. JSTOR, www.jstor.org/stable/j.ctt1287gwp.5. Accessed 8 May 2021.
Fried, J., & Lewis, P. (2015). Gregory the Great and the New Power of the Franks. In The Middle Ages (pp. 23-43). Cambridge, Massachusetts; London, England: Harvard University Press. Retrieved May 8, 2021, from http://www.jstor.org/stable/j.ctt1287gwp.5
Fried, Johannes, and Peter Lewis. "Gregory the Great and the New Power of the Franks." In The Middle Ages, 23-43. Cambridge, Massachusetts; London, England: Harvard University Press, 2015. Accessed May 8, 2021. http://www.jstor.org/stable/j.ctt1287gwp.5.
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