Nurjanah, N., and A. Soekiman. “Identify Factors Affecting Bid Value Below 80% in the Procurement of Construction Goods or Services ”. Journal La Multiapp, Vol. 6, no. 5, Sept. 2025, pp. 1143-58, https://newinera.com/index.php/JournalLaMultiapp/article/view/5806.