Almatius Setya Marsudi, Maria Pudji Lestari, and Nuzulul Hidayati. 2021. “The Use of YouTube Social Media in the Covid19 Pandemic to Improve Understanding of Mathematical Concepts”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12 (13):6327-33. https://doi.org/10.17762/turcomat.v12i13.9921.