Computer playfulness, Internet dependency and their relationships with online activity types and student academic performance / Ronnie Jia
  Bibliogr.: p. 77. - Abstr. eng.
  In: Journal of Behavioral Addictions. - ISSN 2062-5871, eISSN 2063-5303. - 2012. 1. évf. 2. sz., p. 74-77. : ill.