With Gloria Poedjosoedarmo, he has written two textbooks, The Sounds of English and The Grammar of English, and with Adam Brown and Low Ee Ling he has edited three books of articles on Singapore English. He has recent articles on the vowels of Singapore English in English World-Wide and Listening to Estuary English in TESOL Quarterly. His website is: http://davidd.myplace.nie.edu.sg/pers/david.htm.