Simra Asghar, Dr. Muhammad Muzammil, and Usama Bin Zarar. “Impact of Sales Promotion on Profitability of the Pharmaceutical Industry of Pakistan: https://doi.org/10.5281/Zenodo.16849977”. ` 4, no. 01 (August 13, 2025): 2434–2451. Accessed August 14, 2025. https://assajournal.com/index.php/36/article/view/726.