Não informado. Polled Hereford World. American Polled Hereford Association.
Chicagoスタイル(17版)引用形式Não informado. Polled Hereford World. Kansas City, Kan: American Polled Hereford Association.
MLA(8版)引用形式Não informado. Polled Hereford World. American Polled Hereford Association.
警告: この引用は必ずしも正確ではありません.