Burhany, Syafrial, Nugroho Utomo, and Ibnu Sholichin. “Analisa Kelayakan Tarif Kereta Api Ekonomi Lokal Rute Sidoarjo - Bojonegoro Dengan Metode Willingness to Pay”. Jurnal Syntax Admiration 4, no. 10 (October 25, 2023): 1702-1716. Accessed July 3, 2024. https://jurnalsyntaxadmiration.com/index.php/jurnal/article/view/748.