E. Okafo, Sinodukoo, et al. “Formulation and Evaluation of Antimicrobial Properties of Psidium Guajava Ethanol Leaf Extract Creams: doi.org 10.26538 Tjnpr V5i12.17”. Tropical Journal of Natural Product Research (TJNPR), vol. 5, no. 12, Dec. 2021, pp. 2144-8, https://www.tjnpr.org/index.php/home/article/view/274.