Shaharudin, M. S., S. Suhaimi, Y. Fernando, W. A. F. Wan Husain, and . Suparman. “Improvement of Green Procurement Performance in the Global Supply Chain: Evidence from Enterprise Resource Planning and Social Network Analysis”. International Journal of Industrial Management, vol. 10, no. 1, Mar. 2021, pp. 173-94, doi:10.15282/ijim.10.1.2021.6053.