UlfahM., ArianaF., & Lintang TrenggonowatiD. (2021). IMPROVEMENT OF PRODUCT QUALITY THROUGH SIX SIGMA AND FUZZY MARKETING MIX APPROACHES. Jurnal Teknologi Industri Pertanian, 31(1), 1-11. https://doi.org/10.24961/j.tek.ind.pert.2021.31.1.1