Παραπομπή σε μορφή APA (7η εκδ.)

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).

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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