Deswita, R., Erita, S. and Ningsih, F. 2021. The Student’s Learning Obstacle in Calculus Course. Edumatika : Jurnal Riset Pendidikan Matematika. 4, 2 (Dec. 2021), 150–162. DOI:https://doi.org/10.32939/ejrpm.v4i2.1114.