APA (7th ed.) Citation

Ingleton, R. D. (2012). Fortress Kent: The guardian of England. Pen & Sword Military.

Chicago Style (17th ed.) Citation

Ingleton, Roy D. Fortress Kent: The Guardian of England. Barnsley: Pen & Sword Military, 2012.

MLA (9th ed.) Citation

Ingleton, Roy D. Fortress Kent: The Guardian of England. Pen & Sword Military, 2012.

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