* F, Wahyuni Y. THE STUDY OF STUDENTS’ DIFFICULTY IN OPERATING OBE THROUGH TPS METHOD: A CASE STUDY OF ALE (ELEMENTARY LINEAR ALGEBRA) COURSE. er [Internet]. 2017Apr.30 [cited 2024Dec.23];2(4):111-5. Available from: http://cpcontacts.ijrdo.org/index.php/er/article/view/186