Shahid, Sana, and Nisar Ahmed Zubairi. “Comparative Study: An Analysis of WhatsApp Application and SMS by Students & Professionals of Karachi”. Journal of Mass Communication Department, Dept of Mass Communication, University of Karachi 14 (June 19, 2019). Accessed February 15, 2025. http://jmcd-uok.com/index.php/jmcd/article/view/44.