Moses, Agaba, Emenike Kalu O, and Olutayo Osunsan. “Product Innovation, Price Level And Competitive Advantage: A Perception Assessment Of Beer Products”. Jurnal Manajemen dan Kewirausahaan 6, no. 1 (June 29, 2018): 26–34. Accessed June 14, 2026. https://jurnal.unmer.ac.id/index.php/jmdk/article/view/2189.