SIAGIAN, Corry Ester Margaret. TEACHING MATERIALS OF ENGLISH FOR STUDENTS OF MECHANICAL ENGINEERING OF ENGINEERING FACULTY DARMA AGUNG UNIVERSITY MEDAN- A NEED ANALYSIS ON ESP PERSPECTIVE. Jurnal Darma Agung, [S.l.], v. 26, n. 3, p. 620 - 627, dec. 2018. ISSN 2654-3915. Available at: <https://ejurnal.darmaagung.ac.id/index.php/jurnaluda/article/view/71>. Date accessed: 05 nov. 2024. doi: http://dx.doi.org/10.46930/ojsuda.v26i3.71.