History of the popes; their church and state
MLA
Ranke, Leopold von. History of the Popes: Their Church and State. Rev. ed. New York: P. F. Collier, 1901
APA, 7th edition
Ranke, L. von. (1901). History of the popes: their church and state. Rev. ed. New York: P. F. Collier
Chicago, 17th edition
Ranke, Leopold von. History of the popes: their church and state. Rev. ed. New York: P. F. Collier, 1901