suryanto, sugeng. “Pemecahan Masalah Distribusi Frekwensi Mata Kuliah Statistik Melalui Model Two Stay Two Tray Di STKIP PGRI Pacitan”. Jurnal Penelitian Pendidikan 4, no. 2 (June 6, 2022). Accessed March 23, 2025. https://ejournal.stkippacitan.ac.id/ojs3/index.php/jpp/article/view/70.