شريف, �.
(2003).
 نظـرية النظـم.
<em>Tafakkur, 5</em>(1).
Retrieved from <a href="http://37.60.236.48/index.php/tfkr/article/view/584" target="_new">http://37.60.236.48/index.php/tfkr/article/view/584</a>