“ANALISIS KEBUTUHAN ANGKUTAN UMUM BUS DI KABUPATEN BANGKA”. FROPIL (Forum Profesional Teknik Sipil) 6, no. 1 (June 7, 2018): 14–28. Accessed July 5, 2026. https://journal.ubb.ac.id/index.php/fropil/article/view/1262.