APA (7th ed.) Citation

Davis, J. P. (2021). Castles of England. Pen and Sword History.

Chicago Style (17th ed.) Citation

Davis, John Paul. Castles of England. Barnsley, Yorkshire: Pen and Sword History, 2021.

MLA (9th ed.) Citation

Davis, John Paul. Castles of England. Pen and Sword History, 2021.