Silfiana, Rifqi. 2020. “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 5 (1), 42 - 52. https://ejournal.kopertais4.or.id/sasambo/index.php/mutaaliyah/article/view/3696.