Safitri, Mely, Casmudi Casmudi, and Ryan Angga Pratama. “STUDI KASUS KESULITAN BELAJAR MATEMATIKA SISWA KELAS I, II &Amp; III DI SD NEGERI 009 BALIKPAPAN SELATAN”. Kompetensi 12, no. 1 (June 29, 2019): 34–43. Accessed December 23, 2024. https://kompetensi.fkip.uniba-bpn.ac.id/index.php/jurnal-kompetensi/article/view/14.