Mellysa, V., A. Ardi, and Y. Rahmi. “Implementation of Online Learning During Pandemic in Science Subjects at SMPN 6 Padang Panjang”. Ruang-Ruang Kelas : Jurnal Pendidikan Biologi, Vol. 1, no. 1, Dec. 2021, pp. 24-31, http://rrkjurnal.ppj.unp.ac.id/index.php/RRKJURNAL/article/view/6.