Não informado. (2001). Pig improvement services. Meat and Livestock Commission.
Lua i Stíl Chicago (17ú heag.)Não informado. Pig Improvement Services. Bletchley, Inglaterra: Meat and Livestock Commission, 2001.
Lua MLA (8ú heag.)Não informado. Pig Improvement Services. Meat and Livestock Commission, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.