Ahmad, A., Y. Palumpun, and I. Supriadi. “SISTEM PAKAR MENDETEKSI KERUSAKAN IPHONE MENGGUNAKAN CASE BASED REASONING DAN CITY BLOCK (MANHATTAN) (Studi Kasus: IPapua Jayapura)”. Jurnal Teknologi Informasi, Vol. 8, no. 2, Oct. 2020, pp. 14-25, https://ojs.ustj.ac.id/jti/article/view/790.