Não informado. (2021). Holstein Friesian Journal. Holstein Friesian Society.
Chicagoスタイル(17版)引用形式Não informado. Holstein Friesian Journal. Rickmansworth, Inglaterra: Holstein Friesian Society, 2021.
MLA(8版)引用形式Não informado. Holstein Friesian Journal. Holstein Friesian Society, 2021.
警告: この引用は必ずしも正確ではありません.