maggadani, baitha PALANGGATAN, harmita, yahdiana harahap, and HANA LILI NATASYA HUTABALIAN. “SIMULTANEOUS IDENTIFICATION AND QUANTIFICATION OF HYDROQUINONE, TRETINOIN AND BETAMETHASONE IN COSMETIC PRODUCTS BY ISOCRATIC REVERSED PHASE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY”. International Journal of Applied Pharmaceutics 11, no. 3 (May 7, 2019): 181–185. Accessed November 24, 2024. https://journals.innovareacademics.in/index.php/ijap/article/view/32297.