- Author: Parvus, Paul Frölich, Emile Vandervelde, Franz Mehring, Rosa Luxemburg, Karl Kautsky
- Language: Spanish
- Year: 1978
- Author: Paul Frölich David Fernbach
- Language: English
- Year: 2020
Rosa Luxemburg
epub
- Author: Paul Frölich Rossana Rossanda (editor)
- Language: Italian
- Year: 1987
Rosa Luxemburg
pdf
- Author: Paul Frölich
- Language: English
- Year: 2010
Rosa Luxembourg
epub
- Author: Paul Frölich
- Language: English
- Year: 2010
Rosa Luxemburg
mobi
- Author: Paul Frölich
- Language: English
- Year: 2010
- Author: Paul Frölich (Frolich) / Rosa Luxemburgo
- Language: Portuguese
- Year: 2019