N. Amalliyah and D. Ernawati, “Lean Six Sigma Evaluation of Melamine Paint Delivery Quality Performance: Evaluasi Lean Six Sigma terhadap Kinerja Kualitas Pengiriman Cat Melamine”, ijins, vol. 27, no. 3, p. 10.21070/ijins.v27i3.2008, Jun. 2026.