Pongthep Bunrueng,  A Development of English Pronunciation Using Principles of Phonetics for English Major Students at Loei Rajabhat University .   journal   = {International Journal of Cognitive and Language Sciences}, [online]. World Academy of Science, Engineering and Technology.
    May 2014, vol. 90(6). 1655 - 1658
    [viewed 10 May 2024]. Available from: https://publications.waset.org/pdf/9998409.