Mwabungulu, Elias, and Hosea Mungwabi. “The Impact of Smart-Phones Usage on Third-Year Undergraduates in Tanzania: A Case of the University of Dar Es Salaam”. University of Dar es Salaam Library Journal 12, no. 1 (December 7, 2017): 87–105. Accessed April 7, 2026. http://196.44.161.124/index.php/lj/article/view/1077.