Ilcham, Adi. “Pengaruh Oil Sludge Pertamina Surabaya Terhadap Kuat Tekan Keramik Tradisional”. Eksergi 11, no. 1 (October 29, 2014): 11–15. Accessed July 15, 2025. https://jurnal.upnyk.ac.id/index.php/eksergi/article/view/329.