John Langan. (2005). College writing skills with readings / John Langan. McGraw-Hill.
Παραπομπή Chicago StyleJohn Langan. College Writing Skills With Readings / John Langan. McGraw-Hill, 2005.
Παραπομπή MLAJohn Langan. College Writing Skills With Readings / John Langan. McGraw-Hill, 2005.
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