Rosazley, R., M.Z. Shazana, M.A. Izzati, A.W. Fareezal, I. Rushdan, and Z.M.A. Ainun. 2016. “CHARACTERIZATION OF NANOFIBRILLATED CELLULOSE PRODUCED FROM OIL PALM EMPTY FRUIT BUNCH FIBERS (OPEFB) USING ULTRASOUND”. Journal of Contemporary Issues and Thought 6 (September):30-37. https://ojs.upsi.edu.my/index.php/JCIT/article/view/1054.