Fuente: Knowing Our Place in the Animal World, p. 73
Annette Baier: Frases en inglés
Fuente: Knowing Our Place in the Animal World, p. 75
Fuente: Knowing Our Place in the Animal World, p. 68
Fuente: Knowing Our Place in the Animal World, p. 63
Fuente: Knowing Our Place in the Animal World, pp. 63-64