Silfiana, R. “The The Comparative Study Between Using Factor Tree Technique and Tabular Technique in Determining Greatest Common Divisor (GCD) and Least Common Multiple (LCM)”. Jurnal Al-Muta`aliyah : Jurnal Pendidikan Guru Madrasah Ibtidaiyah, Vol. 5, no. 1, Jan. 2020, pp. 42 -52, https://ejournal.kopertais4.or.id/sasambo/index.php/mutaaliyah/article/view/3696.