Nurjanah, Sarifah, et al. “Optimization of Red Ginger (Zingiber Officinale Var. Rubrum) Extraction Using Microwave Assisted Hydrodistillation Method”. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering), vol. 13, no. 2, Apr. 2024, pp. 369-80, doi:10.23960/jtep-l.v13i2.369-380.