Ford Lumban Gaol <br/><br/>
Interdisciplinary Behavior and Social Sciences  Proceedings of the 3rd International Congress on Interdisciplinary Behavior and Social Science 2014 (ICIBSoS 2014), 1-2 November 2014, Bali, Indonesia. 

 -  Taylor and Francis  2015 
<br/><br/><label>ISBN: </label>9780429226427 
<br/><br/><label>Source: </label>EBOOK