APA (7th ed.) Zitazioa
O'Callaghan, J. F. (2011). The Gibraltar crusade: Castile and the battle for the Strait. University of Pennsylvania Press.
Chicago Style (17th ed.) Zitazioa
O'Callaghan, Joseph F. The Gibraltar Crusade: Castile and the Battle for the Strait. Philadelphia: University of Pennsylvania Press, 2011.
MLA (9th ed.) Zitazioa
O'Callaghan, Joseph F. The Gibraltar Crusade: Castile and the Battle for the Strait. University of Pennsylvania Press, 2011.
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