Antibacterial Activity of the Essensial Oils of Lempuyang wangi (Zingiber aromaticum Val.), lempuyang gajah (Zingiber zerumbet Sm), and lempuyang emprit (Zingiber amaricans Bl.) on Three Gram Negative Bacteria. AJAS. 2015;3(2). Accessed March 24, 2026. https://ajouronline.com/index.php/AJAS/article/view/2561