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Yulius Tri Haryanto, Hari Muharam, Agus Setyo Pranowo. PROMOTION STRATEGY & PRODUCT DIVERSIFICATION IN ORDER TO IMPROVE COMPETITIVE ADVANTAGE AND ITS IMPLICATIONS ON PERFORMANCE MARKETING BPR ACROSS THE REGENCY AND SUKABUMI CITY. IJGAM. 2026;2(2):118-128. Accessed April 2, 2026. https://jurnal-ijgam.or.id/index.php/IJGAM/article/view/205