P. M. . Sari, H. . Wahyunita, A. . Yoesoep, Lisdayani, and F. S. . Harahap, “Insecticide Activity Extract of Tinospra crispa Mixed With Cow Urine on Spodoptera litura in the Laboratory”, Petrop, vol. 6, no. 2, pp. 211- 215, Aug. 2019.