- Author: Jack C. Richards, Theodore S. Rodgers
- Language: English
- Year: 2014
- Author: Jack C. Richards Theodore S. Rodgers
- Language: Spanish
- Year: 2003
- Author: Jack C. Richards Theodore S. Rodgers
- Language: English
- Year: 1986
- Author: Jack C. Richards Theodore S. Rodgers
- Language: English
- Year: 2001
- Author: Jack C. Richards Theodore S. Rodgers
- Language: English
- Year: 1986