APA (7th ed.) Citation

(2003). Fortress: Design, technology and history of key fortresses, strategic positions and defensive systems. Osprey Publ.

Chicago Style (17th ed.) Citation

Fortress: Design, Technology and History of Key Fortresses, Strategic Positions and Defensive Systems. Oxford: Osprey Publ, 2003.

MLA (8th ed.) Citation

Fortress: Design, Technology and History of Key Fortresses, Strategic Positions and Defensive Systems. Osprey Publ, 2003.

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