APA (7e ed.) Bronvermelding

Não informado. Polled Hereford World. American Polled Hereford Association.

Chicago (17e ed.) Bronvermelding

Não informado. Polled Hereford World. Kansas City, Kan: American Polled Hereford Association.

MLA (8e ed.) Bronvermelding

Não informado. Polled Hereford World. American Polled Hereford Association.

Let op: Deze citaties zijn niet altijd 100% accuraat.