Gravett, C. (2001). The history of castles: Fortifications around the world (1st Lyons Press ed.). Lyons Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGravett, Christopher. The History of Castles: Fortifications Around the World. 1st Lyons Press ed. Guilford, CT: Lyons Press, 2001.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGravett, Christopher. The History of Castles: Fortifications Around the World. 1st Lyons Press ed. Lyons Press, 2001.
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