白云. (2014). 地球起源未解之谜: Unsolved Mysteries of Earth Creation. 北方妇女儿童出版社.
Dyfyniad Arddull Chicago白云. 地球起源未解之谜: Unsolved Mysteries of Earth Creation. 北方妇女儿童出版社, 2014.
Dyfyniad MLA白云. 地球起源未解之谜: Unsolved Mysteries of Earth Creation. 北方妇女儿童出版社, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.