- Author: Auguste Comte
- Language: Romanian
- Year: 1999
- Author: Auguste Comte
- Language: Italian
- Year: 2009
- Author: Auguste Comte Harriet Martineau
- Language: English
- Year: 2000
- Author: Auguste Comte Harriet Martineau
- Language: English
- Year: 2000
- Author: Auguste Comte
- Language: English
- Year: 2009
- Author: Auguste Comte
- Language: English
- Year: 2009
- Author: Auguste Comte
- Language: Portuguese
- Author: Auguste Comte
- Language: English
- Year: 2005