Yoktavianus Lerson, and Gede Sutrisna. “AN ANALYSIS OF STUDENTS’ GRAMMATICAL ERRORS IN DESCRIPTIVE WRITING TEXT AT TENTH GRADE OF SMA DWIJENDRA DENPASAR IN THE ACADEMIC YEAR 2019 2020”. Widyasrama, vol. 30, no. 2, Dec. 2020, pp. 40-45, http://43.243.142.146/index.php/widyasrama/article/view/1111.