1. Satisfaction, compliance and communication;Ley;Br J Clin Psychol,1982
2. US Department of Education, The National Literacy Survey (ALS). Washington DC, 1993.
3. Joint Commission on Accreditation of Healthcare Organizations (JCAHO). Accreditation manual for hospitals. Chicago: JCAHO, 1995.
4. Doak CC, Doak LG, Root JH. Teaching patients with low literacy skills, 2nd ed. Philadelphia: Lippincott, 1996.
5. Tenth annual report of the bureau of ethnology to the secretary of the Smithsonian Institution 188–89. Washington: Government Printing Office, 1893.