Hasibuan, Sari Yulia, Mohamad Yani, and Irdika Mansur. 2019. “The Effectiveness of Oil Spill Dispersant Addition for Phytoremediation of Petroleum-Contaminated Soil Using Ricinus Communis L”. Journal of Degraded and Mining Lands Management 6 (3). Malang, Indonesia:1811-19. https://doi.org/10.15243/jdmlm.2019.063.1811.