Purwanto AJ, Rulinawaty R, Suparti S, Launggu K. Online Information Service Model at the Distance Learning Program Unit of Open University. Alishlah [Internet]. 2022 Sep. 26 [cited 2026 Nov. 12];14(4):6059-70. Available from: https://www.journal.staihubbulwathan.id/alishlah/article/view/2242