Riyanto, Joko. “ANALISIS KESULITAN SISWA DALAM MENYELESAIKAN OPERASI HITUNG BILANGAN BULAT DI KELAS XII PERHOTELAN PEMINATAN KERJA SMK MITRA INDUSTRI MM 2100 BEKASI”. Journal of Innovation Research and Knowledge 3, no. 5 (October 25, 2023): 989–998. Accessed July 5, 2025. https://mail.bajangjournal.com/index.php/JIRK/article/view/6680.