APA (7th ed.) Citation

Gascoigne, C., & Gascoigne, B. (1992). Castles Of Britain. Thames & Hudson.

Chicago Style (17th ed.) Citation

Gascoigne, Christina, and Bamber Gascoigne. Castles Of Britain. Thames & Hudson, 1992.

MLA (8th ed.) Citation

Gascoigne, Christina, and Bamber Gascoigne. Castles Of Britain. Thames & Hudson, 1992.

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