Irfan, Irfan, Ahmad Perwira Mulia, and Gina Cynthia. “Evaluasi Kelayakan Ekonomi Transportasi Pembangunan Jalan Altrnatif Medan-Berastagi”. Jurnal Syntax Admiration 3, no. 2 (February 24, 2022): 278-296. Accessed July 22, 2024. https://jurnalsyntaxadmiration.com/index.php/jurnal/article/view/385.