- Author: Voegeli William, Bouillon Hardy
- Language: German
- Year: 2023
- Author: Spencer Herbert, Bouillon Hardy
- Language: German
- Year: 2019
- Author: Sowell Thomas, Bouillon Hardy
- Language: German
- Year: 2021
- Author: Jasay Anthony de, Bouillon Hardy
- Language: German
- Year: 2018
- Author: Bouillon Hardy, Andersson Gunnar
- Language: German
- Year: 1991
- Author: Bouillon Hardy, Radnitzky Gerard
- Language: German
- Year: 1991
- Author: Hayek Friedrich August von, Bouillon Hardy
- Language: German
- Year: 2022