Rahmadani, Hana Novia, and Anas Hidayat. “Analysis of Promotional Strategies in Effort to Increase Sales of Astra Motor Purworejo”. Finance : International Journal of Management Finance 1, no. 4 (June 23, 2024): 26–32. Accessed October 22, 2025. https://ejournal.internasional.org/index.php/finance/article/view/45.