- Author: Carl Schmitt
- Language: German
- Year: 1974
- Author: Carl Schmitt Guy Oakes
- Language: English
- Year: 1991
- Author: Carl Schmitt Jeffrey Seitzer John P. McCormick
- Language: English
- Year: 2004
- Author: Carl Schmitt Jeffrey Seitzer John P. McCormick
- Language: English
- Year: 2004