Khasanah U, Waritsman A. The Development Of Digital-Based Reference Books As An Effort Towards A Green Economy. At Turots J. Pendidik. Islam [Internet]. 2026 Jun. 6 [cited 2026 Aug. 4];8(1):1066-80. Available from: https://journal.stitmadani.ac.id/index.php/JPI/article/view/1537