FATTAH, Raihan Abiyan; SUJONO, Firman Kurniawan. Social Presence of Ruangguru in Social Media during Covid-19 Pandemic. Jurnal The Messenger, [S. l.], v. 12, n. 2, p. 180–191, 2020. DOI: 10.26623/themessenger.v12i2.2276. Disponível em: https://journals.usm.ac.id/index.php/the-messenger/article/view/2276. Acesso em: 30 jun. 2026.