APA (7th ed.) Citation

Luxemburg, R., & Kautsky, B. (1950). Briefe an Freunde. Europ. Verl.-Anst.

Chicago Style (17th ed.) Citation

Luxemburg, Rosa, and Benedikt Kautsky. Briefe an Freunde. Hamburg: Europ. Verl.-Anst, 1950.

MLA (8th ed.) Citation

Luxemburg, Rosa, and Benedikt Kautsky. Briefe an Freunde. Europ. Verl.-Anst, 1950.