APA (7th ed.) Citation

Somerset Fry, P. (1997). Castles of Britain and Ireland: The ultimate reference book : a region-by-region guide to over 1,350 castles. Abbeville Press.

Chicago Style (17th ed.) Citation

Somerset Fry, Plantagenet. Castles of Britain and Ireland: The Ultimate Reference Book : A Region-by-region Guide to over 1,350 Castles. New York: Abbeville Press, 1997.

MLA (8th ed.) Citation

Somerset Fry, Plantagenet. Castles of Britain and Ireland: The Ultimate Reference Book : A Region-by-region Guide to over 1,350 Castles. Abbeville Press, 1997.

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