Pangestu, F. A., F. Yulianti, and S. L. Oktarini. “Cultivating a Quality Culture through Total Quality Management: A Case Study of High School Excellence Programs in Yogyakarta”. Nusantara: Jurnal Pendidikan Indonesia, vol. 5, no. 4, Oct. 2025, pp. 847-60, doi:10.62491/njpi.2025.v5i4-2.