Hendrika Saputra, Padilah, and Ade Irwansyah Putra Nasution. “Effrctivenes Of The Biology Learning During The Covid-19 Pandemic Class X MIPA Mas Al Wasliyah Merbau North Labuhanbatu Regency”. International Journal Of Humanities Education and Social Sciences 1, no. 3 (December 30, 2021). Accessed October 9, 2025. https://ijhess.com/index.php/ijhess/article/view/74.