PENGARUH MODEL CONTEXTUAL TEACHING LEARNING BERBANTUAN HANDS ON ACTIVITY TERHADAP HASIL BELAJAR SISWA PADA MATERI PENCEMARAN LINGKUNGAN DIKELAS VII SMP NEGERI 1 MINAS KABUPATEN SIAK TA. 2015/2016. Bio-Lectura : Jurnal Pendidikan Biologi, [S. l.], v. 4, n. 2, 2017. DOI: 10.31849/bl.v4i2.400. Disponível em: https://journal.unilak.ac.id/index.php/BL/article/view/400. Acesso em: 9 may. 2026.