Girsang H, Chamami I. Kendali Mutu Produksi Concrete Tunnel Segment Berbasis Metode Six Sigma Proyek Pembangunan Mass Rapid Transit. jts [Internet]. 1 April 2024 [dikutip 17 Mei 2024];20(1):43-62. Tersedia pada: https://journal.maranatha.edu/index.php/jts/article/view/6391