Septiani Wibowo, J., A. L. Ekowati, L. Wijaya, and K. P. Dewi. “Differences in Skin Moisture Before and After the Administration of Collagen Supplements to Female Medical Students in Jakarta: Research”. Cermin Dunia Kedokteran, vol. 53, no. 06, June 2026, pp. 381-7, doi:10.55175/cdk.v53i06.1579.