Lidya Ayu Permatasari, Kalukar, V. and Wardani, I. (2019) “An Analysis of Grammatical Errors in Writing Thesis Proposal of English Department Students in Mulawarman University in the Academic Year 2018/2019”, E3L: Journal of English Teaching, Linguistic, and Literature , 2(2), pp. 60–64. doi: 10.30872/e3l.v2i2.1994.