Reza Ryan Saputra Syukri, and Edy Suisno. “Sejarah Pertambangan Batubara Sawahlunto Dalam Film Dokumenter ”Tambang Asa””. Nusantara Journal of Multidisciplinary Science 2, no. 4 (November 29, 2024): 973–981. Accessed January 14, 2025. https://jurnal.intekom.id/index.php/njms/article/view/912.