- Author: Author Not Stated
- Language: English
- Year: 2001
- Author: Cindy J. Boyd Jerry Cummins Carol E. Malloy
- Language: English
- Year: 2007
- Author: Jack Price
- Language: English
- Year: 2007
- Author: Lee Arbetman Edward L. McMahon
- Language: English
- Year: 2009
- Author: Alton Biggs
- Language: English
- Year: 2006
- Author: James Schsffer
- Language: English
- Year: 2008
- Author: The McGraw-Hill Companies Inc.
- Language: English
- Year: 2000