THE TITLE
Hitchcock and Brown, Teaching of the Twelve Apostles (1884), English and Greek; Project Gutenberg #42053
Brown, Francis and Hitchcock, Roswell D. (Roswell Dwight)
Another title is Διδαχὴ κυρίου διὰ τῶν δώδεκα Ἀποστόλων, “Teaching of the Lord through the Twelve Apostles.” Athanasius also calls it διδαχή. But Eusebius (Hist iii. 25) uses the plural, διδαχαί. And Clement of Alexandria cites it as γραφή.