APA (7th ed.) Citation

Lawrence, T. E., & Haag, M. (1992). Crusader castles. Immel.

Chicago Style (17th ed.) Citation

Lawrence, T. E., and Michael Haag. Crusader Castles. London: Immel, 1992.

MLA (8th ed.) Citation

Lawrence, T. E., and Michael Haag. Crusader Castles. Immel, 1992.

Warning: These citations may not always be 100% accurate.