Qadar, Riskan, Department of Physics Education, Faculty of Teacher Training and Education,
Universitas Mulawarman, Samarinda (Indonesia)
Qadar, Riskan, Universitas Mulawarman (Indonesia)
Qadar, Riskan, Mulawarman University (Indonesia)
Qirom, Qirom, Politeknik Harapan Bersama (Indonesia)