Style de citation APA (7e éd.)

Eco, U., Lambertini, R., Marmo, C., & Tabarroni, A. On animal language in the medieval classification of signs: Umberto Eco. Roberto Lambertini. On the Medieval theory of signs.(1989).

Style de citation Chicago (17e éd.)

Eco, Umberto, Roberto Lambertini, Costantino Marmo, et Andrea Tabarroni. "On Animal Language in the Medieval Classification of Signs: Umberto Eco. Roberto Lambertini." On the Medieval Theory of Signs.(1989) .

Style de citation MLA (8e éd.)

Eco, Umberto, et al. "On Animal Language in the Medieval Classification of Signs: Umberto Eco. Roberto Lambertini." On the Medieval Theory of Signs.(1989), .