Azis, Adek Cerah Kurnia, et al. “Developing The Gorga Batak Toba Mobile Book: A Digital Innovation for Fine Arts Practice and Education in Indonesian Higher Education”. Jurnal Kependidikan : Jurnal Hasil Penelitian Dan Kajian Kepustakaan Di Bidang Pendidikan, Pengajaran, Dan Pembelajaran, vol. 11, no. 4, Dec. 2025, pp. 1503-14, doi:10.33394/jk.v11i4.17563.