Puntipar Sonthiphand และ Tawan Limpiyakorn. (2008) Communities of ammonia-oxidizing bacteria and archaea in full-scale wastewater treatment plants in Thailand. Chulalongkorn University:ม.ป.ท.Puntipar Sonthiphand และ Tawan Limpiyakorn. 2008. Communities of ammonia-oxidizing bacteria and archaea in full-scale wastewater treatment plants in Thailand. ม.ป.ท.:Chulalongkorn University;Puntipar Sonthiphand และ Tawan Limpiyakorn. Communities of ammonia-oxidizing bacteria and archaea in full-scale wastewater treatment plants in Thailand. ม.ป.ท.:Chulalongkorn University, 2008. Print.