Wiyono, Roland Y. H. Silitonga, and Dhany Heryanto. “The Influence of ISO 9001: 2015 Quality Management System Implementation on Marketing Performance at PT Timah Tbk”. Journal of Management Studies and Development 4, no. 01 (March 10, 2025): 24–33. Accessed October 8, 2026. https://journal.iistr.org/index.php/JMSD/article/view/770.