1.
Melina M, Pasaribu IL, Simanjuntak L. The Analysis of Online Learning PKN in the Covid-19 Pandemic of SMP Negeri 2 Lintongnihuta Humbang Hasundutan Regency. Mantik [Internet]. 2021Nov.2 [cited 2026Apr.19];5(3):1775-81. Available from: https://iocscience.org/ejournal/index.php/mantik/article/view/1749