Gulenko, D.D.GulenkoSerdyuk, O. V.O. V.SerdyukShvets, O. D.O. D.Shvets2013-06-132013-06-132013-06-13http://ir.nmu.org.ua/handle/123456789/2100enCUSTOMERHOW TO TALK TO AN ANGRY CUSTOMERArticle