E-Book Development on ’Bhinneka Tunggal Ika’ for Grade 5 at SDN 1 Sumberjo Kulon. JIEE [Internet]. 2024 Dec. 6 [cited 2026 Jun. 4];2(2):110-7. Available from: https://ejournal.intelektualedu.com/index.php/JIEE/article/view/13