yani, L., N. M.H, M. Zakaria, N. Abdul Rahman, and N. K. “Screening for Antimicrobial Activity of Extracts from Zingiber Officinale Rosc. Var. Rubrum Theilade”. Malaysian Journal of Science (MJS), vol. 20, no. 1, Apr. 2001, pp. 65-69, https://ejournal.um.edu.my/index.php/MJS/article/view/8778.