APA (7th ed.) Citation

Wels, O. (1921). Ultimatum! Vorwärts [u.a.].

Chicago Style (17th ed.) Citation

Wels, Otto. Ultimatum! Berlin [u.a.]: Vorwärts [u.a.], 1921.

MLA (9th ed.) Citation

Wels, Otto. Ultimatum! Vorwärts [u.a.], 1921.