Não informado. (1933). Farm Economist. University of Oxford, Agricultural Economics Research Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Farm Economist. Oxford, Inglaterra: University of Oxford, Agricultural Economics Research Institute, 1933.
Lua MLA (8ú heag.)Não informado. Farm Economist. University of Oxford, Agricultural Economics Research Institute, 1933.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.