1. Akielewicz Józef. 1832. Eysa mociba ap audzieyszonu biszu. Wysim bitinikim un wysuwayrok łatweyszu nu wina ju drauga Leyksnas baznieyc-kunga strupay un skaydri saraksteyta un da drukam paduta. Wilna pi Dworca 1832.[ = High Latvian adaptation of Launitz 1803].
2. Apīnis, Aleksejs. 1998. Neprasot atļauju. Latviešu rokraksta literatūra 18. un 19. gadsimtā. [Without Asking Permission. Latvian Manuscript Literature in the 18th and 19th Centuries]. Riga: Liesma.
3. Assans Ignats. 1908. Latviši [The Latvians]. Saint Peterburg printed by the author.
4. Barton, David. 2007. Literacy: An Introduction to the Ecology of Written Language. 2nd ed. Oxford: Blackwell.
5. Cybuļskis, Jōņs. 2020. Andryvs Jūrdz. [Parallel Text in Latgalian and English, Translated by Aija Nagle]. Rēzekne: Publishing house of Latgola Cultural Center.