Oktavianda, M., Ristiono, R., Fitri, R., & Syamsurizal, S. (2021). Correlation Between Learning Difficulties and Learning Motivation with Students Learning Outcomes on Online Learning in Class VIII at SMP Negeri 13 Padang. Ruang-Ruang Kelas : Jurnal Pendidikan Biologi, 1(1), 40-44. Retrieved from http://rrkjurnal.ppj.unp.ac.id/index.php/RRKJURNAL/article/view/20