APA (7th ed.) Citation

(1978). The castles of the British Isles. Excalibur Books.

Chicago Style (17th ed.) Citation

The Castles of the British Isles. New York: Excalibur Books, 1978.

MLA (9th ed.) Citation

The Castles of the British Isles. Excalibur Books, 1978.

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