?url_ver=Z39.88-2004&rft_id=10.1109%2FISMSC.2015.7594063&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=M.A.&rft.aulast=Abbas&rft.au=Abbas%2C+M.A.&rft.isbn=9781479978946&rft.date=2016&rft.title=The+effectiveness+of+semantic+web+based+preschool+cognitive+skills+tutoring+system%3A+An+empirical+study&rft.genre=proceeding