Arungtasik, Voniyanti, Benyamin Tanan, and Irwan Lie Keng Wong. “Pengaruh Penambahan Abu Limbah Kulit Kakao Terhadap KoefisienPermeabilitas Tanah Dan Piping”. Paulus Civil Engineering Journal 4, no. 3 (January 17, 2024): 411–417. Accessed July 24, 2025. https://ojs.ukipaulus.ac.id/index.php/pcej/article/view/143.