Haryono, H., Ernawati, E. E., Rukiah, R., & Suryani, S. (2017). BIODIESEL SYNTHESIS THROUGH NYAMPLUNG OIL ESTERIFICATION AND TRANSESTERIFICATION USING ULTRASONIC WAVES ASSIST. Jurnal Penelitian Saintek, 22(1), 1–7. https://doi.org/10.21831/jps.v22i1.15505