Não informado. (1928). Journal of Agricultural Economics. Agricultural Economics Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Agricultural Economics. Reading, Inglaterra: Agricultural Economics Society, 1928.
Lua MLA (8ú heag.)Não informado. Journal of Agricultural Economics. Agricultural Economics Society, 1928.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.