Anita Fandra AldionaBudiyanto, Hasan Basri Daulay dan. 1. “OPTIMIZATION OF DEVELOPMENT PERFORMANCEANDQUALITY IMPROVEMENT OF BIODIESEL FROM OIL FRACTIONOF LIQUID WASTE OF PALM OIL PROCESS BY USING ULTRASONIC WAVES”. Jurnal Teknologi Industri Pertanian 22 (1). https://jai.ipb.ac.id/index.php/jurnaltin/article/view/5591.