“Strategies at SMP Muhammadiyah 9 Tanggulangin Boarding School in Online and Offline Learning During the Covid-19 Pandemic: Strategi SMP Muhammadiyah 9 Tanggulangin Boarding School Dalam Pembelajaran Daring Dan Luring Dimasa Pandemic Covid-19”. Proceedings of The ICECRS, vol. 10, Oct. 2021, https://doi.org/10.21070/icecrs20211181.