Yereba Baridakara, and Mgbataogu, Ifeanyi S. “Total Quality Management and Productivity of Steel Threading Firm in Port Harcourt”. International Journal on Economics, Finance and Sustainable Development, Vol. 5, no. 12, Dec. 2023, pp. 17-33, https://journals.researchparks.org/index.php/IJEFSD/article/view/5018.