Não informado. (1970). Current sweden: Environment planning and conservation. Swedish Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Current Sweden: Environment Planning and Conservation. Stockholm: Swedish Institute, 1970.
Lua MLA (8ú heag.)Não informado. Current Sweden: Environment Planning and Conservation. Swedish Institute, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.