R. S. Salsabillah and A. W. Nugraha, “Pengembangan Media Ajar Recolys Math Book Berbantuan Ispring Suite 11 pada Materi Linear Regression and Correlation Analysis di Kelas XI SMAN 1 Tulungagung”, POSTULAT, vol. 6, no. 2, pp. 157–168, Dec. 2025.