Triyani, L., Tindangen, M., & Akhmad, A. (2020). THE PROBLEM OF TEACHERS DEVELOPING SHEET WORK OF STUDENTS (LKPD) HIGH SCHOOL BIOLOGY BASED SCIENTIFIC APPROACH . IJER - INDONESIAN JOURNAL OF EDUCATIONAL REVIEW, 7(02), 27-32. Retrieved from http://103.8.12.212:33180/unj/index.php/ijer/article/view/21700