Liao, Fei-Hsuan. “A New Perspective of CALL Software for English Perceptual Training in Pronunciation Instruction”. The JALT CALL Journal 6, no. 2 (August 31, 2010): 85–102. Accessed September 22, 2026. https://www.castledown.com.au/journals/jaltcall/article/view/jaltcall.v6n2.94.