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Yaser Al-AdwanYarmouk universityfourteen 33Yarmouk2014
  
Yaser Al-AdwanArab World English JournalVolume.7 Number.www.awej.org2016
  
Yaser Al-AdwanGlobal Journal of Educational FoundationVol. 4 (5), pp. 274-149http://www.globalscienceresearchjournals.org/                                      2016
  
Yaser Al-AdwanEducational Research and Reviews3the same2016