Não informado. (1971). Bulletin of Economic Research. University of Hull, Department of Economics.
Lua i Stíl Chicago (17ú heag.)Não informado. Bulletin of Economic Research. Hull, Inglaterra: University of Hull, Department of Economics, 1971.
Lua MLA (8ú heag.)Não informado. Bulletin of Economic Research. University of Hull, Department of Economics, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.