APA (7th ed.) Citation

Long, B. (2024). Castles and strongholds of Northumberland: A history and gazetteer (2nd edition.). The History Press.

Chicago Style (17th ed.) Citation

Long, Brian. Castles and Strongholds of Northumberland: A History and Gazetteer. 2nd edition. Cheltenham: The History Press, 2024.

MLA (9th ed.) Citation

Long, Brian. Castles and Strongholds of Northumberland: A History and Gazetteer. 2nd edition. The History Press, 2024.