Não informado. Polled Hereford World. American Polled Hereford Association.
Style de citation Chicago (17e éd.)Não informado. Polled Hereford World. Kansas City, Kan: American Polled Hereford Association.
Style de citation MLA (8e éd.)Não informado. Polled Hereford World. American Polled Hereford Association.
Attention : ces citations peuvent ne pas être correctes à 100%.