ISTININGRUM, Andian Ari; SARI, Annisa Ratna. Six Sigma As A Means To Enhance Quality Of The Company. Jurnal Ekonomi dan Pendidikan, [S. l.], v. 2, n. 2, 2012. DOI: 10.21831/jep.v2i2.637. Disponível em: https://jurnal.uny.ac.id/index.php/jep/article/view/637. Acesso em: 8 jul. 2025.