Não informado. Polled Hereford World. American Polled Hereford Association.
Cita Chicago Style (17a ed.)Não informado. Polled Hereford World. Kansas City, Kan: American Polled Hereford Association.
Cita MLA (8a ed.)Não informado. Polled Hereford World. American Polled Hereford Association.
Precaución: Estas citas no son 100% exactas.