Hafner, Manuela, and Jeroen Jansz. “The Players‘ Experience of Immersion in Persuasive Games”. International Journal of Serious Games 5, no. 4 (December 18, 2018): 63-79. Accessed January 19, 2019. http://journal.seriousgamessociety.org/index.php/IJSG/article/view/263.