Samosir, Angeline Elisabeth, Viator Lumban Raja, and Fiber Yun A Ginting. 2021. “GRAMMATICAL ERRORS MADE BY THE TENTH GRADE STUDENTS OF SMK GRAFIKA BINA MEDIA MEDAN IN WRITING ADVERTISEMENT TEXT”. Kairos English Language Teaching Journal 4 (2):126-37. https://doi.org/10.54367/kairos.v4i2.1141.