APA (7th ed.) Citation

(1913). Porträt Schwester Clara Zetkin, Gertrud Eißner.

Chicago Style (17th ed.) Citation

Porträt Schwester Clara Zetkin, Gertrud Eißner. 1913.

MLA (8th ed.) Citation

Porträt Schwester Clara Zetkin, Gertrud Eißner. 1913.

Warning: These citations may not always be 100% accurate.