University of Pennsylvania. Foreign Research Institute. Orbis: A Journal of World Affairs. University of Pennsylvania.
Cita Chicago Style (17a ed.)University of Pennsylvania. Foreign Research Institute. Orbis: A Journal of World Affairs. Philadelphia: University of Pennsylvania.
Cita MLA (9a ed.)University of Pennsylvania. Foreign Research Institute. Orbis: A Journal of World Affairs. University of Pennsylvania.
Precaución: Estas citas no son 100% exactas.