American Hereford Association. The American Hereford journal. Hayes Walker.
Cita Chicago Style (17a ed.)American Hereford Association. The American Hereford Journal. Kansas City, Mo.: Hayes Walker.
Cita MLA (8a ed.)American Hereford Association. The American Hereford Journal. Hayes Walker.
Precaución: Estas citas no son 100% exactas.