Noelle-Neumann, E. (1993). The spiral of silence: Public opinion - our social skin (2. Aufl.). The University of Chicago Press.
Lua i Stíl Chicago (17ú heag.)Noelle-Neumann, Elisabeth. The Spiral of Silence: Public Opinion - Our Social Skin. 2. Aufl. Chicago [u.a.]: The University of Chicago Press, 1993.
Lua MLA (8ú heag.)Noelle-Neumann, Elisabeth. The Spiral of Silence: Public Opinion - Our Social Skin. 2. Aufl. The University of Chicago Press, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.