1.
Simorangkir RD, Naibaho TRA, Sinambela P, Panjaitan CT. AN ANALYSIS OF MATERIALS IN A STUDENT TEXTBOOK AT SECONDARY SCHOOL IN 8th GRADE. JEE [Internet]. 2019 Dec. 2 [cited 2021 Jun. 13];5(2):123-9. Available from: https://journal.upp.ac.id/index.php/JEE/article/view/569