Não informado. (1953). Netherlands Journal of Agricultural Science. Royal Netherlands Society for Agricultural Science.
Lua i Stíl Chicago (17ú heag.)Não informado. Netherlands Journal of Agricultural Science. Wageningen, Holanda: Royal Netherlands Society for Agricultural Science, 1953.
Lua MLA (8ú heag.)Não informado. Netherlands Journal of Agricultural Science. Royal Netherlands Society for Agricultural Science, 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.