Sebeok, T. A. (1991). A Sign is Just a Sign. Indiana University Press.
芝加哥风格引文Sebeok, Thomas A. A Sign Is Just a Sign. Bloomington: Indiana University Press, 1991.
MLA引文Sebeok, Thomas A. A Sign Is Just a Sign. Indiana University Press, 1991.
警告：这些引文格式不一定是100％准确.