APA (7th ed.) Citation

Simpson, W. D. (1966). Castles in Britain. B.T. Batsford.

Chicago Style (17th ed.) Citation

Simpson, W. Douglas. Castles in Britain. Londres: B.T. Batsford, 1966.

MLA (9th ed.) Citation

Simpson, W. Douglas. Castles in Britain. B.T. Batsford, 1966.