Não informado. Polish Foreign Trade. Polish Chamber of Foreign Trade.
Lua i Stíl Chicago (17ú heag.)Não informado. Polish Foreign Trade. Warsaw: Polish Chamber of Foreign Trade.
Lua MLA (8ú heag.)Não informado. Polish Foreign Trade. Polish Chamber of Foreign Trade.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.