“CONSUMER PURCHASE INTENTION OF SECOND-HAND SMARTPHONE: MODERATING ROLE OF SUBJECTIVE NORMS AND KNOWLEDGE” (2020) Proceedings of International Interdisciplinary Conference on Sustainable Development Goals (IICSDGs), 3(1), pp. 48–56. Available at: https://journals.ubmg.ac.id/index.php/IICSDGs/article/view/56 (Accessed: 3 April 2026).