Rahmani, Margret, Haryono Haryono, and Eko Purwanti. “Pengembangan Media Komunikasi Buku Penghubung Berbasis SMS Gateway Dan Mobile Web”. Innovative Journal of Curriculum and Educational Technology 6, no. 2 (November 1, 2017): 15-21. Accessed May 6, 2024. https://journal.unnes.ac.id/sju/ujet/article/view/16202.