Zuhri D, and Sehatta S. “THE EFFECTIVENESS OF USING DESIGNED COASTAL AREA MEDIA FOR MATHEMATICS LEARNING”. Primary: Jurnal Pendidikan Guru Sekolah Dasar, vol. 9, no. 6, Dec. 2020, pp. 891-9, https://doi.org/10.33578/jpfkip.v9i6.8022.