Germany (West). Presse- und Informationsamt. (1971). Kassel, May 21, 1970: A documentation. Press and Information Office of the Federal Government.
Lua i Stíl Chicago (17ú heag.)Germany (West). Presse- und Informationsamt. Kassel, May 21, 1970: A Documentation. [S.l.]: Press and Information Office of the Federal Government, 1971.
Lua MLA (8ú heag.)Germany (West). Presse- und Informationsamt. Kassel, May 21, 1970: A Documentation. Press and Information Office of the Federal Government, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.