Toy, S. (1966). A history of fortification from 3000 BC to AD 1700 (2nd ed.). Heinemann.
Chicago Style aipamenaToy, Sidney. A History of Fortification from 3000 BC to AD 1700. 2nd ed. London: Heinemann, 1966.
MLA aipamenaToy, Sidney. A History of Fortification from 3000 BC to AD 1700. 2nd ed. Heinemann, 1966.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.