Não informado. (2021). Farm Economics. Pennsylvannia State University, Cooperative Extension Service.
Cita Chicago Style (17a ed.)Não informado. Farm Economics. University Park, Pa: Pennsylvannia State University, Cooperative Extension Service, 2021.
Cita MLA (8a ed.)Não informado. Farm Economics. Pennsylvannia State University, Cooperative Extension Service, 2021.
Precaución: Estas citas no son 100% exactas.