APA (7th ed.) Citation

Boase, T. S. R. (1971). Kingdoms and strongholds of the crusaders. Thames & Hudson.

Chicago Style (17th ed.) Citation

Boase, T. S. R. Kingdoms and Strongholds of the Crusaders. London: Thames & Hudson, 1971.

MLA (8th ed.) Citation

Boase, T. S. R. Kingdoms and Strongholds of the Crusaders. Thames & Hudson, 1971.

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