Andreas Abeng, C. I. Gunawan, and Fendiyatmi Kusufa, “The Influence of Product Innovation, Product Quality, Promotion, and Price on Customer Satisfaction in Tempe Crisps Small And Medium Enterprises in Kampung Tempe Sanan, Malang City ”, IJMB, vol. 3, no. 1, pp. 175–185, Jan. 2026.