龚勋 & 董明. (2009). 世界文明奇迹: Civiliaztion wonders of the world. 云南教育出版社.
Citación estilo Chicago龚勋 and 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 and 董明. 世界文明奇迹: Civiliaztion Wonders of the World. 云南教育出版社, 2009.
警告：这些引文格式不一定是100％准确.