Saleh, S. M. K., AbdulGhani, O. A., & Al-Hariri, F. M. (2015). Assessment on hydroquinone levels insome skin lightening creams available in Aden markets, Yemen. University of Aden Journal of Natural and Applied Sciences, 19(2), 355–363. https://doi.org/10.47372/uajnas.2015.n2.a09