CHRISTEN, Scott; KELLY, Stephanie; FALL, Lisa; GUELDENZOPH SNYDER, Lisa. Exploring Business Students’ Communicative Needs: Social Presence in Effective Online Instruction. The Journal of Research In Business Education, [S. l.], v. 57, n. 1, p. 31–46, 2015. Disponível em: https://jrbe.nbea.org/index.php/jrbe/article/view/49. Acesso em: 21 apr. 2026.