Cita APA (7a ed.)

O'Callaghan, J. F. (2011). The Gibraltar crusade: Castile and the battle for the Strait. University of Pennsylvania Press.

Cita Chicago Style (17a ed.)

O'Callaghan, Joseph F. The Gibraltar Crusade: Castile and the Battle for the Strait. Philadelphia: University of Pennsylvania Press, 2011.

Cita MLA (9a ed.)

O'Callaghan, Joseph F. The Gibraltar Crusade: Castile and the Battle for the Strait. University of Pennsylvania Press, 2011.