龚勋. (2012). 最不可思议的地球未解之谜: Incredible unsolved mysteries of the earth. 汕头大学出版社.
Chicago Style (17th ed.) Citation龚勋. 最不可思议的地球未解之谜: Incredible Unsolved Mysteries of the Earth. 汕头大学出版社, 2012.
MLA (8th ed.) Citation龚勋. 最不可思议的地球未解之谜: Incredible Unsolved Mysteries of the Earth. 汕头大学出版社, 2012.
Warning: These citations may not always be 100% accurate.