Hamka Nurkaya และ Saipin Chaiyanan. (2012) Microbial cellulase saccharification of oil palm empty fruit bunch and its acid hydrolysis residue for ethanol production. King Mongkut's University of Technology Thonburi:ม.ป.ท.Hamka Nurkaya และ Saipin Chaiyanan. 2012. Microbial cellulase saccharification of oil palm empty fruit bunch and its acid hydrolysis residue for ethanol production. ม.ป.ท.:King Mongkut's University of Technology Thonburi;Hamka Nurkaya และ Saipin Chaiyanan. Microbial cellulase saccharification of oil palm empty fruit bunch and its acid hydrolysis residue for ethanol production. ม.ป.ท.:King Mongkut's University of Technology Thonburi, 2012. Print.