APA (7th ed.) Citation

Kaufmann, J. E., & Kaufmann, H. W. (2018). Castrum to castle: Classical to medieval fortifications in the lands of the western Roman Empire. Pen & Sword Military.

Chicago Style (17th ed.) Citation

Kaufmann, J. E., and H. W. Kaufmann. Castrum to Castle: Classical to Medieval Fortifications in the Lands of the Western Roman Empire. Barnsley, South Yorkshire, UK: Pen & Sword Military, 2018.

MLA (9th ed.) Citation

Kaufmann, J. E., and H. W. Kaufmann. Castrum to Castle: Classical to Medieval Fortifications in the Lands of the Western Roman Empire. Pen & Sword Military, 2018.