Fastabiq.Id: A Model of Muhammadiyah’s Management Media Community at the GrassrootsFilosa Gita Sukmono, Adinda Putri Surya Kencana and Mohammad Jafar LoilatuE3S Web Conf., 440 (2023) 03003DOI: https://doi.org/10.1051/e3sconf/202344003003