1. A dictionary of linguistics and phonetics Crystal, David, 1941-, Hoboken, New Jersey : Wiley & Sons, Inc, [2024]. ENG202 ENG103 ENG381
2. Handbook of the International Phonetic Association: a guide to the use of the International Phonetic Alphabet International Phonetic Association. Cambridge : Cambridge University Press, 1999. ENG202 ENG103 ENG381 ENG160