Gunawan Putra, Hendy, and Budi Susetyo. “Strategy to Increase the Operational Cost Efficiency of Water Treatment Plants by Integrating Green Concept and Value Engineering”. Eduvest - Journal of Universal Studies 6, no. 2 (February 24, 2026): 1944–1957. Accessed March 29, 2026. https://eduvest.greenvest.co.id/index.php/edv/article/view/52786.