Nadtayay, Nawaporn, Shofiyatul Najah, & Wanida Simpol.
" The Development Of Learning Achievement In English Languages Of Grade6 Students In Covid-19 Situation By Applying The Flipped Classroom Concept Inverted." <em>Journal Universitas Muhammadiyah Gresik Engineering, Social Science, and Health International Conference (UMGESHIC)</em> [Online], 1.2 (2021): 216-232. Web.  1 May. 2024