Bhatti, Dr. Muhammad Tariq, and Dr. Roshan Ali Teevno. “Nonverbal Communication (NVC) and Teacher Presence in Collaborative Online Learning”. The Journal of Contemporary Issues in Business and Government, vol. 27, no. 6, Dec. 2021, pp. 308-16, https://cibgp.com/index.php/1323-6903/article/view/2184.