Aroonsrimorakot, Sayam, and Meena Laiphrakpam. “ISO 20400 guidance standard for sustainable procurement: a search for challenges and recommended strategies for successful implementation”. Interdisciplinary Research Review 19, no. 4 (August 27, 2024). accessed September 11, 2026. https://ph02.tci-thaijo.org/index.php/jtir/article/view/251911.