Samosir AE, Lumban Raja V, Ginting FYA. GRAMMATICAL ERRORS MADE BY THE TENTH GRADE STUDENTS OF SMK GRAFIKA BINA MEDIA MEDAN IN WRITING ADVERTISEMENT TEXT. KAIROS [Internet]. 2021Mar.16 [cited 2024Nov.21];4(2):126-37. Available from: https://ejournal.ust.ac.id/index.php/KAIROS/article/view/1141