Humbani, Michael, and Yolanda Jordaan. “Factors That Predict Attitudinal Grouping towards SMS Advertising”. International Journal of Interactive Mobile Technologies (iJIM) 12, no. 5 (September 29, 2018): pp. 97–111. Accessed May 2, 2024. https://online-journals.org/index.php/i-jim/article/view/8985.