Murlistyarini, S., A. R. L. Nugroho, D. T. Sari, and S. Mandasari. “Precipitating Factors of Acne Vulgaris at Dr. Saiful Anwar Hospital Malang”. Jurnal Berkala Epidemiologi, vol. 9, no. 3, Sept. 2021, pp. 257-65, doi:10.20473/jbe.V9I32021.257-265.