RINALDO, H.; SULISTIYOWATI, W. Donut Production Sigma Level and Strategic Positioning: Tingkat Sigma Produksi Donat dan Posisi Strategis. Indonesian Journal of Innovation Studies, [S. l.], v. 26, n. 2, p. 10.21070/ijins.v26i2.2032, 2026. DOI: 10.21070/ijins.v26i2.2032. Disponível em: https://ijins.umsida.ac.id/index.php/ijins/article/view/2032. Acesso em: 5 mar. 2026.