Hosna, Rofiatul, and Ghunniyatul Karimah. “Nature School Curriculum Model: Study of Curriculum Development at Al Izzah Nature School Sidoarjo”. Tribakti: Jurnal Pemikiran Keislaman 31, no. 1 (January 13, 2020): 123-134. Accessed August 12, 2020. https://ejournal.iai-tribakti.ac.id/index.php/tribakti/article/view/980.