O'Callaghan, J. F. ([2011]). The Gibraltar Crusade. Title is part of eBook package: De Gruyter Penn Press eBook Package Complete Collection. doi:10.9783/9780812204636
Chicago Style CitationO'Callaghan, Joseph F.. "The Gibraltar Crusade." Title Is Part of EBook Package: De Gruyter Penn Press EBook Package Complete Collection [2011].
MLA CitationO'Callaghan, Joseph F.. "The Gibraltar Crusade." Title Is Part of EBook Package: De Gruyter Penn Press EBook Package Complete Collection [2011].
Warning: These citations may not always be 100% accurate.