Chidi, O. ., A. . Uzoma, A. . Okwoli, A. . Tereze, and O. . Joseph. “Efficacy of Urena Lobata in Phytoremediation of Spent Engine Oil Polluted Soil”. American Journal of Environment Studies, vol. 4, no. 2, Oct. 2021, pp. 14 -27, doi:10.47672/ajes.807.