白云. (2014). 奇趣自然未解之谜: Unsolved mysteries of interesting nature. 北方妇女儿童出版社.
Dyfyniad Arddull Chicago白云. 奇趣自然未解之谜: Unsolved Mysteries of Interesting Nature. 北方妇女儿童出版社, 2014.
Dyfyniad MLA白云. 奇趣自然未解之谜: Unsolved Mysteries of Interesting Nature. 北方妇女儿童出版社, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.