Nurlaelah, Trijeti, and Putra Pandu Gumelar. “The Impact of Contract Changes on Construction Project Implementation Based On Contractor Perceptions in Indonesia”. Engineering And Technology Journal 9, no. 12 (December 10, 2024): 5606–5609. Accessed December 22, 2024. http://everant.org/index.php/etj/article/view/1644.