Hani, Berkah. “Prediksi Slippage Menggunakan Metode Regresi”. Ultimatics : Jurnal Teknik Informatika 10, no. 2 (March 19, 2019): 73-77. Accessed September 21, 2019. http://ejournals.umn.ac.id/index.php/TI/article/view/940.