Anisa Rosyidasari, and Irwan Iftadi. “Implementasi Six Sigma Dalam Pengendalian Kualitas Produk Refined Bleached Deodorized Palm Oil”. Jurnal INTECH Teknik Industri Universitas Serang Raya, vol. 6, no. 2, Dec. 2020, pp. 113-22, https://doi.org/10.30656/intech.v6i2.2420.