Zahra, Aminatul, et al. “Extract of Seaweed Gracilaria Verrucosa As Immunostimulant to Controlling White Spot Disease in Pacific White Shrimp Litopenaeus Vannamei”. Jurnal Akuakultur Indonesia, vol. 16, no. 2, July 2017, pp. 174-83, https://doi.org/10.19027/jai.16.2.174-183.