(1990). Forts and fortresses: From the hillforts of prehistory to modern times ; the definitive visual account of the science of fortification. Facts on File.
Chicago-Zitierstil (17. Ausg.)Forts and Fortresses: From the Hillforts of Prehistory to Modern Times ; the Definitive Visual Account of the Science of Fortification. New York u.a: Facts on File, 1990.
MLA-Zitierstil (9. Ausg.)Forts and Fortresses: From the Hillforts of Prehistory to Modern Times ; the Definitive Visual Account of the Science of Fortification. Facts on File, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.