Octavia, L. N. and Susanty, A. (2026) “Integrated Pretreatment of B40 Biodiesel in Steam Power Plants: Operational Mitigation, K3L Implementation, and Professional Ethics”, International Journal of Education, Vocational and Social Science , 5(04), pp. 392-412. doi: 10.63922/ijevss.v5i04.6394.