Sri Kusuma Winahyu, Endry Boeriswati, Fathiaty Murtadho. “READING THE ARGUMENT AS ASSESSMENT PROCESS INDONESIAN OPINION TEXT”. International Journal of Advanced Science and Technology, Vol. 29, no. 7s, Apr. 2020, pp. 961 -66, http://sersc.org/journals/index.php/IJAST/article/view/10106.