- Author: Pring Martin J
- Language: English
- Year: 2014
- Author: PRING Martin .J.
- Language: English
- Year: 1993
- Author: Pring Martin J
- Language: English
- Year: 2000
- Author: Pring Martin
- Language: Spanish
- Year: 1989
- Author: Martin Pring Martin Pring
- Language: English
- Year: 2004
- Author: Pring Martin J
- Language: English
- Year: 2000