الإتاحة: https://doi.org/10.20494/TM/9/1/1Testhttps://doi.org/10.20494/TM/9/1Testhttps://ojs.lib.unideb.hu/taplalkozasmarketing/article/view/10872Test
الإتاحة: https://journals.lib.uni-corvinus.hu/index.php/vezetestudomany/article/view/593Test
الإتاحة: http://hdl.handle.net/2437/335800Test