John Langan. (2005). College writing skills with readings / John Langan. McGraw-Hill.
Trích dẫn kiểu ChicagoJohn Langan. College Writing Skills With Readings / John Langan. McGraw-Hill, 2005.
MLA引文John Langan. College Writing Skills With Readings / John Langan. McGraw-Hill, 2005.
警告：这些引文格式不一定是100％准确.