Wongsrikaew, W., Kartika Dewi, L. and Simpol, W. (2021) “EFFECTS OF ENGLISH INSTRUCTION USING THE FLIPPED CLASSROOM CONCEPT TO DEVELOP SPEAKING SKILL OF GRADES 1 - 3 IN COVID-19 SITUATION”, Journal Universitas Muhammadiyah Gresik Engineering, Social Science, and Health International Conference (UMGESHIC), 1(2), pp. 313–322. doi: 10.30587/umgeshic.v1i2.3398.