THE EFFECT OF YOUTUBE VIDEO ON IMPROVING MATHEMATIC COMMUNICATION SKILLS OF THE STUDENTS OF PRIMARY SCHOOL TEACHER EDUCATION. Primary: Jurnal Pendidikan Guru Sekolah Dasar, [S. l.], v. 10, n. 3, p. 542–556, 2021. DOI: 10.33578/10.33578/jpfkip.v10i3.8192. Disponível em: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/821. Acesso em: 14 dec. 2025.