Dillasamola, Dwisari, Fatma Sri Wahyuni, Rauza Sukma Rita, and Yufri Aldi. 2023. “Stigmasterol Isolated from Sungkai (Peronema Canescens Jack) Leaves Induced Natural Killer Cells in SARS-CoV-2 Antigen Challenged Albino Mice: Http: www.doi.org 10.26538 Tjnpr V7i12.8”. Tropical Journal of Natural Product Research (TJNPR) 7 (12): 5420-23. https://tjnpr.org/index.php/home/article/view/3159.