Agkarapin Angkatreerat และ Khantong Soontarapa. (2009) Effects of relative humidity on performance of Pt/zeolite-chitosan membrane in PEM fuel cell. Chulalongkorn University:ม.ป.ท.Agkarapin Angkatreerat และ Khantong Soontarapa. 2009. Effects of relative humidity on performance of Pt/zeolite-chitosan membrane in PEM fuel cell. ม.ป.ท.:Chulalongkorn University;Agkarapin Angkatreerat และ Khantong Soontarapa. Effects of relative humidity on performance of Pt/zeolite-chitosan membrane in PEM fuel cell. ม.ป.ท.:Chulalongkorn University, 2009. Print.