O'Callaghan, J. F. 1. (1975). The Spanish military order of Calatrava and its affiliates. London: Variorum Reprints.
Chicago Style CitationO'Callaghan, Joseph F 1928-. The Spanish Military Order of Calatrava and Its Affiliates. London: Variorum Reprints, 1975.
MLA CitationO'Callaghan, Joseph F 1928-. The Spanish Military Order of Calatrava and Its Affiliates. London: Variorum Reprints, 1975.
Warning: These citations may not always be 100% accurate.