Koppa, Nadhila Adani, Harmita ., and Catur Jatmika. 2018. “SYNTHESIS AND ANALYSIS OF ZINC-METHIONINE, ZINC-TRYPTOPHAN, COPPER-LYSINE, AND COPPER-ISOLEUCINE COMPLEXES USING ATOMIC ABSORPTION SPECTROPHOTOMETRY”. International Journal of Applied Pharmaceutics 10 (1):416-18. https://doi.org/10.22159/ijap.2018.v10s1.92.