- Author: John M. Burkey
- Language: English
- Year: 2006
- Author: John M. Burkey
- Language: English
- Year: 2003
- Author: John M. Burkey, Robert L. Daniels
- Language: English
- Year: 2015
- Author: John M. Burkey Robert L. Daniels
- Language: English
- Year: 2015
- Author: John M. Burkey
- Language: English
- Year: 2006
- Author: John M. Burkey
- Language: English
- Year: 2003