Nuryadin, Rochmad. “Strategi Pembelajaran Nilai Dan Karakter Menghadapi Tantangan Era Industri 4.0”. Al Ghazali 3, no. 1 (June 27, 2020): 117-134. Accessed November 25, 2020. https://ejournal.stainupwr.ac.id/index.php/al_ghzali/article/view/160.