Ilham Effendi Siregar, et al. “COST PLANNING FOR THE BUKIT MAS-KUBANGAN TOMPEK ROAD PRESERVATION PROJECT USING AHSP BINA MARGA 2025”. Bulletin of Engineering Science, Technology and Industry, vol. 4, no. 4, Oct. 2026, pp. 2411-22, https://bestijournal.org/index.php/go/article/view/295.