Purwaningsih, Dyah, Hari Sutrisno, and Kun Sri Budiasih. 2014. “An Application of Digital Chemistry Telling (DCT) in the Basic Inorganic Chemistry Course to Improve Students’ Listening and Speaking Skills”. JOURNAL OF EDUCATION 4 (01). https://jurnal.uny.ac.id/index.php/joe/article/view/1712.