Wulandari Y, Damayanti I, Harahap A. THE ANALYSIS OF THE PROPORTION OF LANGUAGE SKILLS IN ENGLISH TEXTBOOK GRADE XI PUBLISHED BY KEMENDIKBUD 2014. JEET [Internet]. 2019 Feb. 14 [cited 2024 May 4];2(3):40-9. Available from: https://ejournal.unib.ac.id/JEET/article/view/6836