Siti Ruqoyyah, Hana Sakura Putu Arga, and Medita Ayu Wulandari, “THE EFFECT OF YOUTUBE VIDEO ON IMPROVING MATHEMATIC COMMUNICATION SKILLS OF THE STUDENTS OF PRIMARY SCHOOL TEACHER EDUCATION”, JPFKIP, vol. 10, no. 3, pp. 542–556, Jun. 2021, doi: 10.33578/10.33578/jpfkip.v10i3.8192.