龚勋 & 李萍. (2009). 世界上下五千年 第一卷: Illustrated history of the world. 云南教育出版社.
Chicago Style (17th ed.) Citation龚勋 and 李萍. 世界上下五千年 第一卷: Illustrated History of the World. 云南教育出版社, 2009.
MLA (8th ed.) Citation龚勋 and 李萍. 世界上下五千年 第一卷: Illustrated History of the World. 云南教育出版社, 2009.
Warning: These citations may not always be 100% accurate.