APA (7th ed.) Citation

Hyams, J. (2011). The real Downton Abbey: An unofficial guide to the period which inspired the hit TV show. John Blake.

Chicago Style (17th ed.) Citation

Hyams, Jacky. The Real Downton Abbey: An Unofficial Guide to the Period Which Inspired the Hit TV Show. London: John Blake, 2011.

MLA (8th ed.) Citation

Hyams, Jacky. The Real Downton Abbey: An Unofficial Guide to the Period Which Inspired the Hit TV Show. John Blake, 2011.

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