Hall, E. T. (1959). The silent language. Fawcett.
Lua i Stíl Chicago (17ú heag.)Hall, Edward Twitchell. The Silent Language. Greenwich, CT: Fawcett, 1959.
Lua MLA (9ú heag.)Hall, Edward Twitchell. The Silent Language. Fawcett, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.