NIPPARD, Eric; MURPHY, Elizabeth. Social Presence in the Web-based Synchronous Secondary Classroom. Canadian Journal of Learning and Technology, [S. l.], v. 33, n. 1, 2007. DOI: 10.21432/T27S37. Disponível em: https://cjlt.ca/index.php/cjlt/article/view/26460. Acesso em: 1 apr. 2026.