Orfanou, Konstantina, Nikolaos Tselios, and Christos Katsanos. “Perceived Usability Evaluation of Learning Management Systems: Empirical Evaluation of the System Usability Scale”. The International Review of Research in Open and Distributed Learning 16, no. 2 (April 15, 2015). Accessed April 19, 2024. https://www.irrodl.org/index.php/irrodl/article/view/1955.