Nimsung, Rujapa, Audomsark Haesungcharern, and Kumpol Klunklin. “A COLORIMETRIC DETERMINATION OF HUMAN SERUM GAMMA GLUTAMYL TRANSPEPTIDASE (GGTP) ACTIVITY : I. A SUITABLE TECHNIQUE”. Journal of Associated Medical Sciences 14, no. 1 (July 6, 2016): 5. accessed September 11, 2026. https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/61909.