1.
Harahap R, siswadi siswadi, Hidayat MA. PEMAHAMAN KONSEP MATEMATIS SELAMA MASA PANDEMI COVID-19. JKPM [Internet]. 2022 May 9 [cited 2025 Jul. 29];1(2):29-36. Available from: https://ejurnal.univamedan.ac.id/index.php/jkpm/article/view/230