Birsyada, M.I. et al. 2021. Motorbike gang network in Yogyakarta: Socio-cultural studies between the relation of moral and religion habituation of local teenagers. Harmoni Sosial: Jurnal Pendidikan IPS. 8, 1 (Apr. 2021), 34–44. DOI:https://doi.org/10.21831/hsjpi.v8i1.39894.