Mutlu, Savaş, and İbrahim Efe Efeoglu. “Evaluation of E-Mail Usage by Extended Technology Acceptance Model”. International Review of Management and Marketing 3, no. 3 (June 14, 2013): 112–121. Accessed May 23, 2022. https://www.econjournals.com/index.php/irmm/article/view/511.