- Author: Jean Robertson Craig McDaniel
- Language: English
- Year: 2000
- Author: Ehrhardt Michael C., Brigham Eugene F.
- Language: English
- Year: 2005
- Author: Grossman Ragozin
- Language: English
- Year: 1994
- Author: Grossman Ragozin
- Language: English
- Year: 1994
- Author: N. Gregory Mankiw
- Language: English
- Year: 2001