Mann, H. K., & Hollnsteiner, J. (1925). The lives of the popes in the early middle ages (2nd ed.). K. Paul.
Chicago Style (17th ed.) CitationMann, Horace K., and Johannes Hollnsteiner. The Lives of the Popes in the Early Middle Ages. 2nd ed. London: K. Paul, 1925.
MLA (8th ed.) CitationMann, Horace K., and Johannes Hollnsteiner. The Lives of the Popes in the Early Middle Ages. 2nd ed. K. Paul, 1925.
Warning: These citations may not always be 100% accurate.