Amira Zahra, A., C. Sutiono, F. Mu’in, and E. Febriyanti. “An Analysis On The Students’ Grammatical Errors In Writing Descriptive Texts And Narrative Texts”. LINGUA EDUCATIA, Vol. 2, no. 1, Mar. 2020, pp. 14-28, http://jtam.ulm.ac.id/index.php/gej/article/view/366.