- Author: Alfred Jules Ayer
- Language: Turkish
- Author: Alfred Jules Ayer
- Language: Turkish
- Year: 2002
- Author: Alfred Jules Ayer
- Language: English
- Author: Alfred J. Ayer Sir Alfred Jules Ayer
- Language: English
- Year: 1952
- Author: Alfred Jules Ayer
- Language: Italian
- Year: 1961
- Author: Alfred Jules Ayer
- Language: Polish
- Year: 2000
- Author: Alfred Jules Ayer
- Language: Polish
- Year: 2000