- Author: Douglas Allen
- Language: English
- Year: 1998
- Author: Douglas Allen Box
- Language: English
- Year: 2003
- Author: Owen Strachan, Douglas Allen Sweeney
- Language: English
- Year: 2010
- Author: Douglas Allen
- Language: English
- Year: 2011
- Author: Douglas Allen
- Language: Spanish
- Year: 1985
- Author: Box Douglas Allen
- Language: English
- Year: 2009
- Author: Douglas Allen Wicks
- Language: English
- Year: 2006
- Author: Douglas Allen
- Language: English
- Year: 2011
- Author: Douglas Allen Box
- Language: English
- Year: 2009
- Author: douglas allen (ed)
- Language: English
- Year: 1988