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-Zitierstil (17. Ausg.)Eco, Umberto, Roberto Lambertini, Costantino Marmo, und Andrea Tabarroni. "On Animal Language in the Medieval Classification of Signs: Umberto Eco. Roberto Lambertini." On the Medieval Theory of Signs.(1989) .
MLA-Zitierstil (8. Ausg.)Eco, Umberto, et al. "On Animal Language in the Medieval Classification of Signs: Umberto Eco. Roberto Lambertini." On the Medieval Theory of Signs.(1989), .
警告：這些引文格式不一定是100％准確.