Ashari, A., & Ciptati, C. (2019). Isolation of Essential Oils from Essential Roots (Vetiveria zizanoides L.) with Preparation Using Liquid Nitrogen. Stannum : Jurnal Sains Dan Terapan Kimia, 1(1), 20-24. https://doi.org/10.33019/jstk.v1i1.1418