Aston, E., & Savona, G. (1991). Theatre as Sign-System: A semiotics of text and performance. Routledge.
Chicago Style (17. basım) AtıfAston, Elaine, ve George Savona. Theatre as Sign-System: A Semiotics of Text and Performance. New York: Routledge, 1991.
MLA (9th ed.) AtıfAston, Elaine, ve George Savona. Theatre as Sign-System: A Semiotics of Text and Performance. Routledge, 1991.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..