Siagian, Nur Kholidiah. “THE INFLUENCE OF ADDING EMPTY PALM FRUIT BUNCH ASH AND SUGARCANE BAGASSE ASH TO EXPANSIVE CLAY SOIL ON SOIL COMPACTION”. Jurnal Teknik Sipil : Rancang Bangun, vol. 10, no. 1, Apr. 2024, pp. 047-56, https://ejournal.um-sorong.ac.id/index.php/rancangbangun/article/view/3251.