- Author: James E. Dolezal Paul Helm
- Language: English
- Year: 2011
- Author: Peter Kwasniewski Martin Mosebach
- Language: English
- Year: 2017
- Author: Kristof K.P. Vanhoutte
- Language: English
- Year: 2018
- Author: Frank Viola
- Language: English
- Year: 2018
- Author: Joseph Ratzinger
- Language: English
- Year: 2014
- Author: Hans Urs von Balthasar
- Language: English
- Year: 1991
- Author: Hans Urs von Balthasar
- Language: English
- Year: 1990
- Author: Hans Urs von Balthasar
- Language: English
- Year: 1989
- Author: Hans Urs von Balthasar
- Language: English
- Year: 2011
- Author: Hans Urs Von Balthasar
- Language: English
- Year: 2004