龚勋 & 董明. (2009). 世界文明奇迹: Civiliaztion wonders of the world. 云南教育出版社.
Chicago Style (17th ed.) Citation龚勋 i 董明. 世界文明奇迹: Civiliaztion Wonders of the World. 云南教育出版社, 2009.
Cita MLA龚勋 i 董明. 世界文明奇迹: Civiliaztion Wonders of the World. 云南教育出版社, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.