Agrest, D., & Sebeok, T. A. (1977). A Perfusion of Signs. Indiana University Press.
Lua i Stíl Chicago (17ú heag.)Agrest, Diana, agus Thomas A. Sebeok. A Perfusion of Signs. Bloomington: Indiana University Press, 1977.
Lua MLA (9ú heag.)Agrest, Diana, agus Thomas A. Sebeok. A Perfusion of Signs. Indiana University Press, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.