Wongsrikaew, Warissara, 		Kartika Dewi, Lilis, AND 		Simpol, Wanida.
" EFFECTS OF ENGLISH INSTRUCTION USING THE FLIPPED CLASSROOM CONCEPT TO DEVELOP SPEAKING SKILL OF GRADES 1 - 3 IN COVID-19 SITUATION" <em>Journal Universitas Muhammadiyah Gresik Engineering, Social Science, and Health International Conference (UMGESHIC)</em> [Online], Volume 1 Number 2 (22 December 2021)