Syafi’i AA, Bengang E, Wulandari F, Ladopurab HH. Implementation of the Green School Festival to Increase Strengthening of Character Education in Era 4.0: Pelaksanaan Green School Festival Untuk Meningkatkan Penguatan Pendidikan Karakter di Era 4.0 . icecrs [Internet]. 2020 Jun. 27 [cited 2025 Sep. 8];8. Available from: https://icecrs.umsida.ac.id/index.php/icecrs/article/view/450