- Author: John Allen, Robert Dorsman
- Language: Dutch
- Year: 2009
- Author: Allen Robert C
- Language: English
- Year: 2017
Maximum Influence
epub
- Author: Allen Robert, Mortensen Kurt W
- Language: English
- Year: 2013
- Author: Allen Robert G., Hansen Mark Victor
- Language: English
- Year: 2009
- Author: Allen Robert G., Hansen Mark Victor
- Language: English
- Year: 2009
- Author: Allen Robert C., Muñoz de Bustillo Francisco
- Language: Spanish
- Year: 2014
- Author: Allen Robert Clyde, Maltby Richard, Stokes Melvyn
- Language: English
- Year: 2015
- Author: Allen Robert C
- Language: English
- Year: 2011
- Author: ALLEN ROBERT VINCENT
- Language: English
