Zainol, Norazwina, et al. “FACTORIAL ANALYSIS ON PROCESSING FACTORS FOR NITROGEN, PHOSPHORUS AND POTASSIUM CONTENTS IN MUSHROOM WASTE”. Journal of Chemical Engineering and Industrial Biotechnology, vol. 1, no. 1, Mar. 2017, pp. 42-56, https://doi.org/10.15282/jceib.v1i1.3736.