Rahmanu, I Wayan Eka Dian, 		Winarta, Ida Bagus Gde Nova, AND 		Susyarini, Ni Putu Wiwiek Ary.
"An empirical study on grammatical error uttered by non-native English students" <em>Journal of Applied Studies in Language</em> [Online], Volume 4 Number 2 (6 December 2020)