Cita APA (7a ed.)

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.