Siripen Ungsitipoonporn. 2007. Phonological and acoustic analysis of the tone system of Hakka as spoken in Bangkok, Thailand. Institute of Language and Culture for Rural Development, Mahidol University;
Siripen Ungsitipoonporn. (2007) Phonological and acoustic analysis of the tone system of Hakka as spoken in Bangkok, Thailand . Mahidol University/Bangkok.
Siripen Ungsitipoonporn. Phonological and acoustic analysis of the tone system of Hakka as spoken in Bangkok, Thailand. . Bangkok:Mahidol University, 2007.
Siripen Ungsitipoonporn. (2007) Phonological and acoustic analysis of the tone system of Hakka as spoken in Bangkok, Thailand . Mahidol University/Bangkok.