Kosasi, Ferry, Misdalina Misdalina, and Treny Hera. 2021. “Faktor-Faktor Bagi Siswa Kesulitan Belajar Matematika Pada Masa Pandemi Covid-19 Di Kelas IV SD Negeri 7 Air Kumbang”. Innovative: Journal Of Social Science Research 2 (1):35-43. https://doi.org/10.31004/innovative.v2i1.2827.