Pujiastuti, Y. ., E. . Indriani, A. Muslim, C. . Irsan, and A. . Arsi. “Effectivity of Bacillus Thuringiensis from Soil in Freshwater Swamps Against Epilachna Sp. Larvae”. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands, vol. 10, no. 1, Apr. 2021, pp. 46-53, doi:10.36706/JLSO.10.1.2021.531.