Jansen, Davy Ivan Robert, and Erwin Erwin. “Cost and Time Control of the Landikma Health Center Project Using Earned Value”. ASTONJADRO 15, no. 2 (May 29, 2026): 661–678. Accessed May 30, 2026. http://150.107.142.43/index.php/ASTONJADRO/article/view/23074.