Praptono, Elite Perdana, Fajar Pasaribu, Hazmanan Khair, Widya Astuti, and Sri Rahayu. 2026. “Marketing Strategy for Indonesian Natural Stone Based on Digital Certificate of Authenticity (COA): Systematic Literature Review”. Proceeding of International Conference Technology, Economics, and Social Science 1 (1):744-48. https://www.journals.adaresearch.or.id/ictess/article/view/130.