龚勋. (2012). 游遍世界: Guiding tour around whole world. 汕头大学出版社.
Dyfyniad Arddull Chicago龚勋. 游遍世界: Guiding Tour Around Whole World. 汕头大学出版社, 2012.
Dyfyniad MLA龚勋. 游遍世界: Guiding Tour Around Whole World. 汕头大学出版社, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.