Grammar
- Huddleston R. D. & Pullum G. K. (2002). The cambridge grammar of the english language. Cambridge University Press.
- Carter R. & McCarthy M. (2006). The cambridge grammar of english : a comprehensive guide. Cambridge University Press.
- Carley P. & Mees I. M. (2019). American english phonetics and pronunciation practice (First). Routledge.
Phonetics
- https://aschmann.net/AmEng/
- https://www.internationalphoneticassociation.org/IPAcharts/IPA_chart_orig/pdfs/IPA_Kiel_2020_full.pdf
- https://soundsamerican.net/
- https://en.wiktionary.org/wiki/Wiktionary:International_Phonetic_Alphabet
- https://en.wikipedia.org/wiki/Pronunciation_respelling_for_English
- https://www.dialectsarchive.com/