Kamalasari, Aliq Fiya, Y.L. Sukestiyarno, and Adi Nur Cahyono. 2022. “E-Module Using Van Hiele Phases of Learning to Improve Student’s Mathematical Creative Thinking Skills”. Unnes Journal of Mathematics Education Research 11 (2), 200-208. https://journal.unnes.ac.id/sju/ujmer/article/view/75262.