1. Phonetics for communication disorders;Ball,2005
2. Articulatory and phonological impairments: a clinical focus;Bauman-Waengler,2004
3. Articulation and phonological disorders: speech sound disorders in children;Bernthal,2012
4. Boersma P, Weenink D. Praat: Doing phonetics by computer [Computer program]. Version 6.0.40; 2018. Retrieved September 17 from http://www.fon.hum.uva.nl/praat/.
5. Hearing – an introduction to psychological and physiological acoustics;Gelfand,2004