Izah, S. C., E. Uhunmwangho, and N. G. Etim. “Antibacterial and Synergistic Potency of Methanolic Leaf Extract of Ocimum Gratissimum L. And Vernonia Amygdalina L.”. Journal of Basic Pharmacology and Toxicology, Vol. 2, no. 1, Jan. 2018, pp. 8-12, https://scigreen.com/index.php/JBPT/article/view/43.