1. Baker, Colin. 1992. Attitudes and Language. Clevedon: Multilingual Matters. https://doi.org/10.2307/329108.
2. Council of Europe. 2001. Common European Framework of Reference for Languages: Learning, Teaching, Assessment. Cambridge: Cambridge University Press.
3. Državni izpitni center. 2021. Nacionalno preverjanje znanja. Letno poročilo o izvedbi v šolskem letu 2020/2021. Ljubljana: Državna komisija za vodenje nacionalnega preverjanja znanja.
4. Education First. 2018. EF English Proficiency Index. Accessed November 10, 2022. https://www.ef.com/assetscdn/WIBIwq6RdJvcD9bc8RMd/cefcom-epi-site/reports/2018/ef-epi-2018-english.pdf.
5. European Commission. 2012a. Europeans and Their Languages: Report. Accessed December 19, 2022. https://op.europa.eu/en/publication-detail/-/publication/f551bd64-8615-4781-9be1-c592217dad83.