- Author: Paul Hopper
- Language: English
- Year: 2017
- Author: Paul Hopper
- Language: English
- Year: 2018
- Author: Paul Hopper
- Language: English
- Year: 2006
- Author: Paul Hopper
- Language: English
- Year: 2006
- Author: Joan L. Bybee (Ed.) Paul Hopper (Ed.)
- Language: English
- Year: 2001