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