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 and 董明. 世界文明奇迹: Civiliaztion Wonders of the World. 云南教育出版社, 2009.
MLA (8th ed.) Citation龚勋 and 董明. 世界文明奇迹: Civiliaztion Wonders of the World. 云南教育出版社, 2009.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.