- Author: Charles Bettelheim
- Language: Spanish
- Year: 1965
- Author: Charles Bettelheim
- Language: Italian
- Year: 1976
- Author: Charles Bettelheim
- Language: Turkish
- Year: 1982
- Author: Charles Bettelheim
- Language: Spanish
- Author: Charles Bettelheim
- Language: Spanish
- Author: Charles Bettelheim
- Language: German
- Year: 1974
- Author: Charles Bettelheim
- Language: English
- Year: 1974
- Author: Charles Bettelheim
- Language: English
- Year: 1976
- Author: Charles Bettelheim
- Language: English
- Year: 1978
- Author: Charles Bettelheim
- Language: English
- Year: 1994