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 : Jurnal Pendidikan Biologi, [S. l.], v. 6, n. 1, p. 78–86, 2019. Disponível em: https://journal.unilak.ac.id/index.php/BL/article/view/2696. Acesso em: 30 apr. 2026.