Aston, E., & Savona, G. (1991). Theatre as sign-system: A semiotics of text and performance. Routledge.
Lua i Stíl Chicago (17ú heag.)Aston, Elaine, agus George Savona. Theatre as Sign-system: A Semiotics of Text and Performance. London ; New York: Routledge, 1991.
Lua MLA (9ú heag.)Aston, Elaine, agus George Savona. Theatre as Sign-system: A Semiotics of Text and Performance. Routledge, 1991.
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