Grass, G. (1969). Speak out: Speeches, open letters, commentaries. Harcourt, Brace & World.
Lua i Stíl Chicago (17ú heag.)Grass, Günter. Speak Out: Speeches, Open Letters, Commentaries. New York,: Harcourt, Brace & World, 1969.
Lua MLA (8ú heag.)Grass, Günter. Speak Out: Speeches, Open Letters, Commentaries. Harcourt, Brace & World, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.