Wulan, N. P.; Soetjipto, B. E.; Churiyah, M. The Effect Of Sales Promotion And Social Media Marketing On The Purchase Intention Of BSI Gold Products Through Perceived Value, Brand Awareness, Trust, And Customer Engagement As Mediation Variables: Systematic Literature Review (SLR) With Bibliometrics. ECBIS 2026, 4, 1669-1686.