- Author: Robert Allen Kepner
- Language: English
- Year: 1978
- Author: Robert Allen Bartlett
- Language: English
- Year: 2009
- Author: Robert Allen Bartlett
- Language: Spanish
- Year: 2011
- Author: Robert Allen Palmatier
- Language: English
- Year: 2017
- Author: Robert Allen Rutland
- Language: English
- Year: 1990
- Author: Brian Cotnoir James Wasserman Robert Allen Bartlett
- Language: English
- Year: 2021
- Author: Robert Allen
- Language: English
- Year: 2002
- Author: Robert Allen
- Language: English
- Year: 1998
- Author: Britton Robert Allen, Cani Patrice D
- Language: English
- Year: 2018
- Author: O'Hair Dan, Rubenstein Hannah, Stewart Robert Allen
- Language: English
- Year: 2015