Chronicon
(engl.: K. B. Wolf)
at CCEL
[www.ccel.org/p/pearse/morefathers/isidore_chronicon_01_trans.htm]

Etymologiae (books 20)
(lat.)
at The Latin Library
[www.thelatinlibrary.com/isidore.html]

Etymologiae (books 20)
(lat.ed.: W. M. Lindsay)
at Bibliotheca Augustana
[www.fh-augsburg.de/~harsch/Chronologia/Lspost07/Isidorus/isi_et00.html]

Etymologiae (books 20)
(lat.)
at Penelope University Chicago
[penelope.uchicago.edu/Thayer/E/Roman/Texts/Isidore/home.html]

Sententiae (books 3)
(lat.)
at The Latin Library
[www.thelatinlibrary.com/isidore.html]

Sententiae (books 3)
(lat.)
at Bibliotheca Augustana
[www.fh-augsburg.de/~harsch/Chronologia/Lspost07/Isidorus/isi_se00.html]