- Author: Giuseppe Cambiano
- Language: Italian
- Year: 1976
- Author: Titus Burckhardt (ed.)
- Language: Italian
- Year: 2004
- Author: Elio Bartolini (ed.)
- Language: Italian
- Year: 1970
- Author: InterVarsity Press., Bray Gerald Lewis, Oden Thomas C
- Language: English
- Year: 2019
- Author: Mugnai Massimo
- Language: Italian
- Year: 1982
- Author: Renato Russo
- Language: Portuguese
- Year: 2017
- Author: Valentí Fiol Eduardo
- Language: Spanish, Latin
- Year: 1946