Não informado. (1956). National Hog Farmer. National Swine Growers Center.
Lua i Stíl Chicago (17ú heag.)Não informado. National Hog Farmer. MGrundy Center, Ohio: National Swine Growers Center, 1956.
Lua MLA (8ú heag.)Não informado. National Hog Farmer. National Swine Growers Center, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.