Kruse, F., Williams, B., & Deely, J. (1986). Frontiers in Semiotics. Indiana University Press.
Lua i Stíl Chicago (17ú heag.)Kruse, Felicia, Brooke Williams, agus John Deely. Frontiers in Semiotics. Bloomington: Indiana University Press, 1986.
Lua MLA (9ú heag.)Kruse, Felicia, et al. Frontiers in Semiotics. Indiana University Press, 1986.
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