Muchtaromah, Bayyinatul, et al. “The Effect of Ethanol Extract of Calotropis Gigantea Root in Increasing the Level of IFN-γ and the Expression of Caspase 3 on Mice (Mus Musculus L.) With Fibrosarcoma”. International Journal of Engineering & Technology, vol. 8, no. 1.9, Jan. 2019, pp. 269-73, https://doi.org/10.14419/ijet.v8i1.9.26667.