Ashraf, Zahida. “Invisible Data: The Hidden Information Big Tech Collects Without Explicit Input : How Passive Data Collection and Behavioral Analytics Are Shaping Digital Decisions Without User Awareness”. PakTech Today 1, no. 9 (June 25, 2026): 234–235. Accessed July 29, 2026. https://pakjournals.com/ojs/index.php/ptt/article/view/275.