Não informado. University of Pennsylvania medical bulletin. University of Pennsylvania, School of Medicine.
Cita Chicago Style (17a ed.)Não informado. University of Pennsylvania Medical Bulletin. Philadelphia, Pa: University of Pennsylvania, School of Medicine.
Cita MLA (8a ed.)Não informado. University of Pennsylvania Medical Bulletin. University of Pennsylvania, School of Medicine.
Precaución: Estas citas no son 100% exactas.