The Australian National University, Research School of Pacific Studies, 1989. — 184 p. — (Pacific Linguistics: Series A 80/Papers in South-East Asian Linguistics 12).
Thai sentence particles: forms, meanings and formal-semantic variations
Forms and meanings of the Thai particle si (Previously published in South-East Asian linguistic studies, vol.4:61-98)
Forms and meanings of the Thai particle na
The problem of the sixth tone in Thai (Also published in a Festschrift for William Gedney)
Thai nasalised vowels (Previously published in Journal of the Humanities, 10:3/59-68, Chiang Mai University, Thailand)