Não informado. (1969). Journal of Development Planning. United Nations, Department of Economic and Social Affairs.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Development Planning. New York: United Nations, Department of Economic and Social Affairs, 1969.
Lua MLA (8ú heag.)Não informado. Journal of Development Planning. United Nations, Department of Economic and Social Affairs, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.