Sum-ang Homchurn และ Kasin Suvatabandhu. (1976) Taxonomic study of flowering plants in Khon Kaen university campus. Chulalongkorn University.:ม.ป.ท.Sum-ang Homchurn และ Kasin Suvatabandhu. 1976. Taxonomic study of flowering plants in Khon Kaen university campus. ม.ป.ท.:Chulalongkorn University.;Sum-ang Homchurn และ Kasin Suvatabandhu. Taxonomic study of flowering plants in Khon Kaen university campus. ม.ป.ท.:Chulalongkorn University. 1976. Print.