Não informado. (2021). Holstein Friesian Journal. Holstein Friesian Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Holstein Friesian Journal. Rickmansworth, Inglaterra: Holstein Friesian Society, 2021.
Lua MLA (8ú heag.)Não informado. Holstein Friesian Journal. Holstein Friesian Society, 2021.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.