- Author: Luis Ugarte (aut.), Sofía Pachas (ed.)
- Language: Spanish
- Year: 2005
- Author: Carlo Fabbri (aut.), Sofía Pachas (ed.)
- Language: Spanish
- Year: 2010
- Author: Evaristo San Cristóval Sofía Pachas Juan Zárate Patricia Maceda
- Language: Spanish
- Year: 2009
- Author: Sofía Pachas Antenor Borja García
- Language: Spanish
- Year: 2010
- Author: Sofía Pachas
- Language: Spanish
- Year: 2006
- Author: Sofía Pachas (ed.)
- Language: Spanish
- Year: 2004
- Author: Gladis Mascco (aut.), Sofía Pachas (trad.)
- Language: Spanish
- Year: 2004
- Author: Sofía Pachas Maceda
- Language: Spanish
- Year: 2006