- Author: Harald Haarmann
- Language: German
- Year: 2021
- Author: Harald Haarmann LaBGC
- Language: English
- Year: 2021
- Author: Harald Haarmann (editor)
- Language: English
- Year: 1995
- Author: Harald Haarmann
- Language: English
- Year: 1990
- Author: Harald Haarmann
- Language: English
- Year: 1989
- Author: Harald Haarmann
- Language: English
- Year: 1986
- Author: Harald Haarmann
- Language: English
- Year: 1991
- Author: Harald Haarmann
- Language: German
- Year: 2019
- Author: Harald Haarmann
- Language: Italian
- Year: 2022
- Author: Harald Haarmann
- Language: Italian
- Year: 2021