APA (7th ed.) Citation

Simpson, W. D. (1969). Castles in England and Wales / W. Douglas Simpson. Batsford.

Chicago Style (17th ed.) Citation

Simpson, W. Douglas. Castles in England and Wales / W. Douglas Simpson. London: Batsford, 1969.

MLA (9th ed.) Citation

Simpson, W. Douglas. Castles in England and Wales / W. Douglas Simpson. Batsford, 1969.

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