- Author: John Locke
- Language: Italian
- Year: 2006
- Author: Jean-Jacques Rousseau
- Language: Italian
- Year: 2006
- Author: Michel de Montaigne
- Language: Italian
- Year: 2006
- Author: Edmund Husserl
- Language: Italian
- Year: 2006
- Author: Martin Heidegger
- Language: Italian
- Year: 2006
- Author: Georg Wilhelm Friedrich Hegel
- Language: Italian
- Year: 2006
- Author: Lorenzo Novacassa, Emilio Estiú, Immanuel Kant
- Language: Spanish
- Year: 2004
- Author: Adam Smith
- Language: Italian
- Year: 2006