丁绍兰. (2009). 令孩子着迷的100个未解之谜: Top 100 amazing unsolved mysteries for children. 陕西科学技术出版社.
Dyfyniad Arddull Chicago丁绍兰. 令孩子着迷的100个未解之谜: Top 100 Amazing Unsolved Mysteries for Children. 陕西科学技术出版社, 2009.
Dyfyniad MLA丁绍兰. 令孩子着迷的100个未解之谜: Top 100 Amazing Unsolved Mysteries for Children. 陕西科学技术出版社, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.