APA (7th ed.) Citation

Eco, U. (1979). A theory of semiotics. Indiana University Press.

Chicago Style (17th ed.) Citation

Eco, Umberto. A Theory of Semiotics. Bloomington: Indiana University Press, 1979.

MLA (9th ed.) Citation

Eco, Umberto. A Theory of Semiotics. Indiana University Press, 1979.

Warning: These citations may not always be 100% accurate.