Pattaraporn Boonsai และ Chanpen Chanchao. (2012) Antibacterial activity and chemical compositions of Apis mellifera propolis extracts from Nan province, Thailand. Chulalongkorn University:ม.ป.ท.Pattaraporn Boonsai และ Chanpen Chanchao. 2012. Antibacterial activity and chemical compositions of Apis mellifera propolis extracts from Nan province, Thailand. ม.ป.ท.:Chulalongkorn University;Pattaraporn Boonsai และ Chanpen Chanchao. Antibacterial activity and chemical compositions of Apis mellifera propolis extracts from Nan province, Thailand. ม.ป.ท.:Chulalongkorn University, 2012. Print.