Bunnajirakul, S., and N. Tipmongkolsilp. “Effecicacy of Transfer Factor Substance as a Growth Promoter in Nile Tilapia (Oreochromis niloticus)”. Journal of Mahanakorn Veterinary Medicine, vol. 10, no. 1, Dec. 2018, pp. 41-48, https://li01.tci-thaijo.org/index.php/jmvm/article/view/159111.