Aulia, S., R. . Primaharinastiti, and D. A. . Purwanto. “Development and Validation GC/MS Method for Methamphetamine Analysis in Urine by Miniaturization QuEChERS”. Science and Technology Indonesia, vol. 8, no. 3, July 2023, pp. 451-60, doi:10.26554/sti.2023.8.3.451-460.