Ãâó : http://www.koince.org/wp-content/uploads/2018/04/3%ec%a3%bc%ec%a0%9c%ec%86%8c%eb%b9%84%ec%9e%90%ea%b8%80%eb%a1%9c%eb%b2%8c-%ec%97%ad%eb%9f%89%ea%b0%95%ed%99%94%ec%99%80-%ec%86%8c%eb%b9%84%ec%9e%90%ea%b5%90%ec%9c%a1%ec%a0%95%ec%b1%85%ec%9d%98-%eb%b0%a9%ed%96%a5ppt.pdf