Titiya Chittihunsa และ Tipaporn Subsomboon. (2009) Bee Pathogens and the Utilization of Bee Immune Substances. <i>Thai Agricultural Research Journal</i>, <i>27</i>(1), 98-121.Titiya Chittihunsa และ Tipaporn Subsomboon. "Bee Pathogens and the Utilization of Bee Immune Substances". Thai Agricultural Research Journal 27 (2009):98-121.Titiya Chittihunsa และ Tipaporn Subsomboon. Bee Pathogens and the Utilization of Bee Immune Substances. Department of Agriculture:ม.ป.ท. 2009.