Nadia Utami, et al. “The Influence of Value Proposition, Customer Perceived Value, Customer Engagement, and Delivery Process on Purchase Decisions of Kopi Kenangan Products in Bandar Lampung”. Green Inflation: International Journal of Management and Strategic Business Leadership, vol. 3, no. 2, May 2026, pp. 88-96, doi:10.61132/greeninflation.v3i2.711.