Goembira, Fadjar. “Sawahlunto Sang Penghasil Bahan Bakar: Mungkinkah Abadi?”. Puitika 20, no. 3 (December 6, 2024): 276–289. Accessed March 4, 2026. https://jurnalpuitika.fib.unand.ac.id/index.php/jurnalpuitika/article/view/630.