Erizar, E. “The Introduction of Constructivist Aprroach In Islamic Education Classroom”. AT-TA’DIB: JURNAL ILMIAH PRODI PENDIDIKAN AGAMA ISLAM, Vol. 9, no. 2, Dec. 2017, pp. 143 -50, https://ejournal.staindirundeng.ac.id/index.php/tadib/article/view/12.