Muhammad Farhan Maulana, Lalu Srigede, Lale Budi Kusuma Dewi, and Ari Khusuma. 2026. “Urine Analysis Based on Sampling Time in Tramadol Abusers”. Journal of Indonesia Laboratory Students (JILTS) 5 (2). https://doi.org/10.32807/jilts.v5i2.492.