Abd. Malek, S. N., Ibrahim, H., Lai, H. S., Serm, L. G., Seng, C. K., Yusoff, M. M., & Mohd. Ali, N. A. (2005). Essential Oils of Zingiber ottensii Valet. and Zingiber zerumbet (L.) Sm. from Sabah, Malaysia. Malaysian Journal of Science, 24(1), 49–58. Retrieved from http://mojes.um.edu.my/index.php/MJS/article/view/17162