http://www.courseforme.com/call-international/courses
http://www.waterloo.be/annuaire/commerces/recrutementformation/call-international-10042
http://www.languagecourses.net/en/schools/call-international
http://www.maisondelafrancite.be/fr/?ID=71&mode=det&n=8
http://www.dorifor.be/organisme/call-center-for-accelerated-language-learning-15.html
http://www.opleidingengids.be/opleidingenbedrijf.php?id_aanbieder=160