APA (7th ed.) Citation
ebrary, Inc, Eco, U., & Marmo, C. (1989). On the medieval theory of signs. J. Benjamins.
Chicago Style (17th ed.) Citation
ebrary, Inc, Umberto Eco, and Costantino Marmo. On the Medieval Theory of Signs. Amsterdam ; Philadelphia: J. Benjamins, 1989.
MLA (9th ed.) Citation
ebrary, Inc, et al. On the Medieval Theory of Signs. J. Benjamins, 1989.
Warning: These citations may not always be 100% accurate.