Mahmud, Mahmud, and Linda Linda. “Designing English Coursebook for Islamic Bilingual Boarding School Based on the Value of the Four Pillars of Nationality”. Jurnal Kependidikan: Jurnal Hasil Penelitian Dan Kajian Kepustakaan Di Bidang Pendidikan, Pengajaran Dan Pembelajaran, vol. 7, no. 1, Mar. 2021, pp. 17-27, doi:10.33394/jk.v7i1.2909.