APA (7th ed.) Citation

Ludwig, O., Hebbel, F., & Francke, K. (2004). The German Classics of the Nineteenth and Twentieth Centuries, Volume 09 Friedrich Hebbel and Otto Ludwig. Project Gutenberg.

Chicago Style (17th ed.) Citation

Ludwig, Otto, Friedrich Hebbel, and Kuno Francke. The German Classics of the Nineteenth and Twentieth Centuries, Volume 09 Friedrich Hebbel and Otto Ludwig. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Ludwig, Otto, et al. The German Classics of the Nineteenth and Twentieth Centuries, Volume 09 Friedrich Hebbel and Otto Ludwig. Project Gutenberg, 2004.

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