Indi Rahmat Hidayat, Gigih Hapsak Pradipto, and Ghina Farhah Azizah, “Analisis Defect Produk Material pada Bracket Rear Starter Menggunakan Metode Six Sigma di Pt Otomotif Cikarang”, JOUMI, vol. 4, no. 2, pp. 600–616, Jun. 2026.