Agustini, Tyas, and Abdi Wahab. “Aplikasi Penghubung Guru Dan Orang Tua: E-Counseling: Studi Kasus SMP Negeri 89 Jakarta”. Ultima InfoSys : Jurnal Ilmu Sistem Informasi 11, no. 2 (December 28, 2020): 97–106. Accessed August 5, 2025. https://ejournals.umn.ac.id/index.php/SI/article/view/1739.