Sebeok, T. A. (1991). A Sign is Just a Sign. Indiana University Press.
Lua i Stíl Chicago (17ú heag.)Sebeok, Thomas A. A Sign Is Just a Sign. Bloomington: Indiana University Press, 1991.
Lua MLA (9ú heag.)Sebeok, Thomas A. A Sign Is Just a Sign. Indiana University Press, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.