Wibawa and Widyastuti, T. M. (2019) “Improved Communication of Parents and Teachers by Using Android-Based Applications as a Media for Forming Character Children at an Early Age in Elementary School SD. Taman Sari 3 Yogyakarta”, International Journal of Engineering Technology and Natural Sciences, 1(2), pp. 31 - 36. doi: 10.46923/ijets.v1i2.48.