杜根 & 孟新. (2018). 剧变: The day the world took off. 中国科学技术出版社.
Dyfyniad Arddull Chicago杜根 and 孟新. 剧变: The Day the World Took off. 中国科学技术出版社, 2018.
Dyfyniad MLA杜根 and 孟新. 剧变: The Day the World Took off. 中国科学技术出版社, 2018.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.