Hilma, R., Akbar, U. and Prasetya, - (1930) “OPTIMUM CONDITION OF BIOETANOL PRODUCTION VIA ACIDIC HYDROLYSIS FROM PINEAPLE (Ananas comosus Merr.) PEEL WASTE IN KUALU VILLAGE-KAMPAR”, Photon: Jurnal Sain dan Kesehatan, 7(02), pp. 135-142. doi: 10.37859/jp.v7i02.519.