(2003). OECD territorial reviews: Helsinki, Finland. OECD.
Lua i Stíl Chicago (17ú heag.)OECD Territorial Reviews: Helsinki, Finland. Paris, Cedex, France: OECD, 2003.
Lua MLA (9ú heag.)OECD Territorial Reviews: Helsinki, Finland. OECD, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.