Aston, E., & Savona, G. (1991). Theatre as sign-system: A semiotics of text and performance. Routledge.
芝加哥风格引文Aston, Elaine, 与 George Savona. Theatre as Sign-system: A Semiotics of Text and Performance. London ; New York: Routledge, 1991.
MLA引文Aston, Elaine, 与 George Savona. Theatre as Sign-system: A Semiotics of Text and Performance. Routledge, 1991.
警告：这些引文格式不一定是100％准确.