
- Author: Rudolf Steiner Roland Everett Douglas Sloan
- Language: English
- Year: 1996

- Author: Rudolf Steiner Catherine E. Creeger
- Language: English
- Year: 1997

- Author: Rudolf Steiner Christopher Bamford
- Language: English
- Year: 2001

- Author: Rudolf Steiner
- Language: English
- Year: 1947

- Author: Rudolf Steiner Torin M Finser
- Language: German
- Year: 1997