“THE RELATIONSHIP BETWEEN ANXIETY AND RETENTION TOWARDS LEARNING ACHIEVEMENT REMEDIAL ON MATERI SKELETON SYSTEM IN CLASS VIII SMP NEGERI 30 PEKANBARU ACADEMIC YEAR 2018/2019”, Bio-lectura, vol. 6, no. 1, pp. 78–86, Apr. 2019, Accessed: Apr. 26, 2026. [Online]. Available: https://journal.unilak.ac.id/index.php/BL/article/view/2696