Não informado. (1977). Population Reports. Johns Hopkins University, Population Information Program.
Lua i Stíl Chicago (17ú heag.)Não informado. Population Reports. Baltimore, Md: Johns Hopkins University, Population Information Program, 1977.
Lua MLA (8ú heag.)Não informado. Population Reports. Johns Hopkins University, Population Information Program, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.