Incoming Resources
- Xlibris Corp., s.n., 2001
- Xlibris Corp., Philadelphia, PA, 2005
- Xlibris Corp., S.l., 2000
- Xlibris Corp., Philadephia, PA?, 2000
- Xlibris Corp., Place of publication not identified, ©2006
- Xlibris Corp., Bloomington, IN, c2009
- Xlibris Corp., Philadelphia, PA, ©2008