1-Terminology pertaining to fluency and fluency disorders: Guidelines. ASHA 1999 Mar-Apr; 41(19): 29-36.
2-Van Borsel J, Tetnowski JA. Fluency disorders in genetic syndromes. J Fluency Disord 2007; 32: 279-296.
3-Devenny DA, Silverman WP. Speech dysfluency and manual specialization in Down’s syndrome. J Ment Defici Res 1990; 34: 253-260.
4-Schlanger BB, Gottsleben RH. Analysis of speech defects among the institutionalized mentally retarded. J Speech Hear Disord 1957; 22: 98-103.
5-Adler S. The influence of genetic syndromes upon oral communication skills. J Speech Hear Disord 1976; 41: 136-137.
6-Evans D. The development of language abilities in Mongols: A correlational study. J Ment Defici Res 1977; 21: 103-117.
7-Willcox A. An investigation into non-fluency in Down’s syndrome. British J Disord Commun 1988; 23: 153-170.
8-Van Riper C. The nature of stuttering. Englewood Cliffs, NJ: Prentice-Hall; 1971.
9-Stansfield J. Prevalence of stuttering and cluttering in adults with mental handicaps. J Ment Defici Res 1990; 34: 287-307.
10-Rondal JA. Language in mental retardation: Individual and syndromic differences, and neurogenetic variation. Swiss J Psychol 2001; 60: 161-178.
12-Rondal JA, Buckley S. Speech and language intervention in Down syndrome. 1st ed. London: Whurr Publishers; 2003.
13-Preus A. Treatment of mentally retarded stutterers. J Fluency Disord 1990; 15: 223-233.
14-Thurman S, Barnes-Brett T, Ryan C, Tierney L. Reducing stammering in adults with mental handicaps. Ment Handicap 1986; 14: 62-64.
15-Guitar B, McCauley R. Treatment of stuttering: Established and emerging interventions. 1st ed. Baltimore, MD: Lippincott Williams & Willkins; 2010.
16-Yairi E, Ambrose N. Early childhood stuttering I: Persistency and recovery rates. J Speech Lang Hear Res 1999; 42: 1097-1112.
17-Tavakkoli MA, Baghooli H, Ghamat Boland HR, Bolhari J, Birashk B. Standardizing Vineland adaptive behaviuor scale among Iranian population. Iranian Psychi Clinic Psychol 2000; 5(20): 27-36.
18-Foadodini M, Beydokhti H. The effect of drama therapy base on social skill adjusting behavior of mental retarded girls (IQ=55-70, 14-30 years old). J Res Rehabil Sci 2012; 8(5): 913-918.
19-Nilipour R. Farsi Aphasia Test.1st ed. Tehran: Iranian University of Medical Siences Press; 1995. P. 33-88.
20-Nilipour R, Paradis M, Ashayeri H, Raghibdust S. Syndromes of Aphasia in Persian: Published research papers. 1st ed. Tehran: State Welfare Organization of Iran & University of Welfare and Rehabilitation Siences Press; 2002.
21-Salim-Abadi Farahani F, Zamani P. The investigation of relationship between auditory short-term memory and mean length of sentence (MLS) in first grade students of elementary schools in Isfahan. Unpublished B.Sc dissertation. Faculty of rehabilitation Isfahan University of Medical Sciences, 2002.
22-Bakhtiar M, Seyfpanahi S, Ansari H, Ghanadzade M, Packman A. Investigation of reliability of the SSI-3 for preschool Persian-speaking children who stutter. J Fluency Disord 2010; 35: 87-91.
23-Guitar B. Stuttering: An integrated approach to its nature and treatment. 3rd ed. Baltimore: Lippincott, Williams & Wilkins Pub; 2006.
24-Ashtiyani H. Pictural Stories (1). 11th ed. Tehran: Madreseh Pub; 2002.
25-Arabloo A, Razaghi S. Pictural Stories (2). 8th ed. Tehran: Madreseh Pub; 2002.
26-Ham R. Clinical management of stuttering in older children and adults.1st ed. Maryland, USA: Aspen Publishers; 1999.
27-Runyan CM, Runyan SE. The fluency rules program. In: Guitar B, McCauley R. Treatment of stuttering: Established and emerging interventions. 1st ed. Baltimore, MD: Lippincott Williams & Willkins; 2010. p. 167-170.
28-Hegde MN. Treatment protocols for stuttering. 1st ed. San Diego, CA: Plural Publishing; 2007.
29-Jongsma AE. The speech-language pathology treatment planner. 1st ed. New Jersey, Hoboken, John Wiley & Sons Inc; 2004.
)