- Author: Stephen Northcutt Judy Novak
- Language: English
- Year: 2002
- Author: Stephen Northcutt
- Language: English
- Year: 1999
- Author: Stephen Northcutt Judy Novak
- Language: English
- Year: 2002
- Author: Stephen Northcutt Judy Novak
- Language: English
- Year: 2002
- Author: Stephen Northcutt Judy Novak
- Language: English
- Year: 2002
- Author: Stephen Northcutt, Karen Frederick, Scott Winters, Lenny Zeltser, Ronald W. Ritc
- Language: English
- Year: 2005