Darmadi, Herru, Yan Fi, and Hady Pranoto. 2017. “Evaluasi Aksesibilitas Learning Object Berdasarkan Web Content Accessibility Guidelines 2.0”. Ultimatics : Jurnal Teknik Informatika 9 (2), 67-71. https://doi.org/https://doi.org/10.31937/ti.v9i2.602.