Izayanah FN, Masnuna, Susanti WD, Hidayat V, Asyhari H. Sign System Design as Information Media in Darussalam Islamic Education Institutions Surabaya. nuscientech [Internet]. 2023May14 [cited 2023Sep.24];2023(33):14-27. Available from: http://nstproceeding.com/index.php/nuscientech/article/view/909