APA (7th ed.) Citation

Turnbull & Noon. (2007). The great wall of China 221 BC-AD 1644. Osprey publishing limited.

Chicago Style (17th ed.) Citation

Turnbull and Noon. The Great Wall of China 221 BC-AD 1644. New York: Osprey publishing limited, 2007.

MLA (9th ed.) Citation

Turnbull and Noon. The Great Wall of China 221 BC-AD 1644. Osprey publishing limited, 2007.

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