KOZAN, Kadir. A Comparative Structural Equation Modeling Investigation of the Relationships among Teaching, Cognitive and Social Presence. Online Learning, Boston, MA, v. 20, n. 3, 2016. DOI: 10.24059/olj.v20i3.654. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/654. Acesso em: 25 mar. 2026.