Selective Mutism. American Speech-Language-Hearing Association., http://www.asha.org/public/speech/disorders/SelectiveMutism.htm. Accessed February 9 2015.
Berger F. Selective Mutism. University of Tennessee. http://www.utmedicalcenter.org/your-health/encyclopedia/disease/001546/. 2/24/2014. Accessed February 9 2015.
Frequently Asked Questions About SM. Selective Mutism Group. http://www.selectivemutism.org/faq. Accessed February 9 2015.
About SM Brochure. Selective Mutism Foundation, Inc. http://www.selectivemutismfoundation.org/info-on-selective-mutism/about-sm-brochure. Accessed February 9 2015.