- HTML (115 pages, indexed) at Bartleby.com (Translator unknown; not the same as the CCEL version)
- HTML (Multi-page, indexed) at Christian Classics Ethereal Library (Translated by Aloysius Kroft and Harold Bolton)
Available at Amazon.com:
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- Paperback edition, translated by Dr. Joseph Tylenda (Vintage Books, 1998, 304 pg).
All links verified on or after October 28, 2019