- Author: Ruggiero Romano
- Language: Italian
- Year: 1992
- Author: Corrado Vivanti (editor) Ruggiero Romano (editor)
- Language: Italian
- Year: 1981
- Author: Ruggiero Romano
- Language: Spanish
- Year: 1993
- Author: Ruggiero Romano Alberto Tenenti
- Language: Spanish
- Year: 1980
- Author: Luciano Violante (editor) Corrado Vivanti (editor) Ruggiero Romano (editor)
- Language: Italian
- Year: 2001
- Author: Ruggiero Romano
- Language: Portuguese
- Year: 1995
- Author: Ruggiero Romano Alberto Tenenti
- Language: Spanish
- Year: 1980
- Author: Ruggiero Romano Alberto Tenenti
- Language: Spanish
- Year: 1980