Harahap, Y., L. R. Marsudi, and S. . “EFFECT OF DIFFERENT ANTICOAGULANTS IN DETERMINING METFORMIN HYDROCHLORIDE LEVELS IN HUMAN PLASMA USING HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY”. International Journal of Applied Pharmaceutics, vol. 10, no. 1, Dec. 2018, pp. 148-51, doi:10.22159/ijap.2018.v10s1.31.