APA (7e ed.) Bronvermelding

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).

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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