Etim, E. A. ., E. F. . Chagwa, E. I. . Obeagu, and A. A. . Udokang. “Staining Effect of Methanolic Extract of Hibiscus Sabdariffa Calyx on Thin Peripheral Blood Smear”. Journal of Diseases, vol. 6, no. 1, Feb. 2019, pp. 1-6, doi:10.18488/journal.99.2019.61.1.6.