IPA, International Phonetic Association. 2015. The International Phonetic Alphabet (revised to 2015).
https://www.internationalphoneticassociation.org/sites/default/files/IPA_Kiel_2015.pdf
@misc{IPA2015, author = {IPA, International Phonetic Association}, title = {The International Phonetic Alphabet (revised to 2015)}, url = {https://www.internationalphoneticassociation.org/sites/default/files/IPA_Kiel_2015.pdf}, year = {2015} }