Harahap, Inatigris Anggriani, Amrin . Saragih, and Zainuddin . Zainuddin. 2022. “TEXT TYPES USED IN THE TEXTBOOKS: A SYSTEMIC LINGUISTIC“BASED STUDY”. LINGUISTIK TERAPAN 18 (3):218-26. https://doi.org/10.24114/lt.v18i3.31395.