Etexts:
- German Multi-Format (HTML, EPUB, Kindle, Text) at Project Gutenberg (Translated by Christoph Martin Wieland)
- German HTML (24 pages, hover over "Inhalt" for index) at Projekt Gutenberg-DE (Translated by Christoph Martin Wieland)
- German HTML (7 pages, hover over "Inhalt" for index) at Projekt Gutenberg-DE (Translated by Franz Dingelstedt)
All links verified on or after May 8, 2019