- Author: Wiersbe Warren W.
- Language: English
- Year: 2016
- Author: Wiersbe Warren W
- Language: English
- Year: 2009
- Author: Wiersbe Warren W
- Language: English
- Year: 2009
- Author: Wiersbe Warren W.
- Language: English
- Year: 2011
- Author: Wiersbe Warren W, Sugden Howard F
- Language: English
- Year: 2005