Utami, Athika Dwi Wiji, Agung Purnomo, Masyitah Noviyanti, Fatkul Anam, and Evi Mahsunah. 2021. “Student Centered Learning and Flipped Classroom of Lesson Study: A Case Study in Higher Education”. Middle European Scientific Bulletin 14 (July). https://doi.org/10.47494/mesb.v14i.662.