O'Callaghan, J. F. (1993). The learned king: The reign of Alfonso X of Castile. University of Pennsylvania Press.
Chicago Style (17th ed.) CitationO'Callaghan, Joseph F. The Learned King: The Reign of Alfonso X of Castile. Philadelphia: University of Pennsylvania Press, 1993.
MLA (9th ed.) CitationO'Callaghan, Joseph F. The Learned King: The Reign of Alfonso X of Castile. University of Pennsylvania Press, 1993.
Warning: These citations may not always be 100% accurate.
