KHOLIFAH, N., and S. CHENDRA WIBAWA. “PENGEMBANGAN E-CONTENT VIDEOGRAFI BERBASIS INSTAGRAM MATA PELAJARAN PENGOLAHAN CITRA DIGITAL DI SMK NEGERI 4 SURABAYA”. IT-Edu : Jurnal Information Technology and Education, Vol. 3, no. 01, Jan. 2019, https://ejournal.unesa.ac.id/index.php/it-edu/article/view/26668.