International Phonetic Association (1978). "The International Phonetic Alphabet (Revised to 1979)". Journal of the International Phonetic Association. 8 (1–2). Supplement. JSTOR44541414. Reprinted in MacMahon (2010), p. 271. MacMahon, Michael K. C. (2010). "The International Phonetic Alphabet". In Malmkjaer, Kirsten (ed.). The Routledge Linguistics Encyclopedia (3rd ed.). Routledge. pp. 269–275. ISBN978-0-415-42104-1.
International Phonetic Association (1978). "The International Phonetic Alphabet (Revised to 1979)". Journal of the International Phonetic Association. 8 (1–2). Supplement. JSTOR44541414. Reprinted in MacMahon (2010), p. 271. MacMahon, Michael K. C. (2010). "The International Phonetic Alphabet". In Malmkjaer, Kirsten (ed.). The Routledge Linguistics Encyclopedia (3rd ed.). Routledge. pp. 269–275. ISBN978-0-415-42104-1.