Langan, J. (2005). College writing skills, with readings (6th ed.). Boston: McGraw-Hill.
Παραπομπή Chicago StyleLangan, John. College Writing Skills, With Readings. 6th ed. Boston: McGraw-Hill, 2005.
Παραπομπή MLALangan, John. College Writing Skills, With Readings. 6th ed. Boston: McGraw-Hill, 2005.
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