Presley, Regina G., Denise M. Cumberland, and Kevin Rose. “A Comparison of Cognitive and Social Presence in Online Graduate Courses: Asynchronous Vs. Synchronous Modalities”. Online Learning 27, no. 2 (June 1, 2023). Accessed March 26, 2026. https://olj.onlinelearningconsortium.org/index.php/olj/article/view/3046.