Sitompul, Surya Rezeki, Universitas Muhammadiyah Jakarta, Indonesia

• Jurnal Speed (Sport, Physical Education, Empowerment) Vol. 3 No. 2 (2020): Jurnal Sport, Physical Education and Empowerment (JSPEED) - Artikel
  ANALYSIS OF THE IMPACT OF THE USE OF GAWAI / GADGET ON SPORT ACTIVITIES OF ELEMENTARY SCHOOL STUDENTS
  Abstract