APA (7th ed.) Citation

Eco, U. (1980). Signo (2a. ed.). Labor.

Chicago Style (17th ed.) Citation

Eco, Umberto. Signo. 2a. ed. Barcelona: Labor, 1980.

MLA (9th ed.) Citation

Eco, Umberto. Signo. 2a. ed. Labor, 1980.

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