Pal, Nidhi. “Antibacterial Activity of Hibiscus Rosa Sinensis and Calendula Offcinalis Flowers Extract Against Various Pathogen”. International Journal of Scientific Research in Biological Sciences 2, no. 3 (June 30, 2015): 5–8. Accessed April 5, 2025. https://ijsrbs.isroset.org/index.php/j/article/view/12.