Coping with dementia: advice for caregivers. Parkinson's Disease Foundation. http://www.pdf.org/en/spring03_dementia. Spring 2003. Accessed November 18, 2015.
Parkinson's dementia. Parkinson’s Disease Society of the United Kingdom. http://www.parkinsons.org.uk/sites/default/files/publications/download/english/fs58_parkinsonsdementia.pdf. June 2011. Accessed November 18, 2015.
Mark MH, Sage JI. Young Parkinson’s Handbook. The American Parkinson Disease Association Inc. 2000. http://www.stlapda.org/content/pdfs/Young%20Parkinson%20Handbook.pdf. Accessed March 2016.