Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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