Roofi`’i, Mohammad. “PENDEKATAN KAIZEN DALAMPERBAIKAN MUTU PENDIDIKAN”. Al Ulya: Jurnal Pendidikan Islam 7, no. 2 (March 28, 2023): 112–127. Accessed October 5, 2024. https://journal2.unugiri.ac.id/index.php/al-ulya/article/view/1568.