1. Handbook of Speech Pathology and Audiology;Travis,1971
2. The Clinician's Guide to Treating Cleft Palate Speech;Peterson-Falzone,2006
3. Nasalance norms in Greek adults;Okalidou;Clin. Linguist. Phon.,2011
4. Nasalance scores of sentences in children with hearing loss;Bahrami;J. Mazandaran Uni. Med. Sci.,2019
5. Nasalance scores of Egyptian hearing impaired children;Haleem;J. Curr. Med. Res. Pract.,2019