APA (7th ed.) Citation

Lawrence, T. E. (1988). Crusader castles (A new ed.). Clarendon Pr.

Chicago Style (17th ed.) Citation

Lawrence, Thomas E. Crusader Castles. A new ed. Oxford: Clarendon Pr, 1988.

MLA (9th ed.) Citation

Lawrence, Thomas E. Crusader Castles. A new ed. Clarendon Pr, 1988.