1. Improving access to services for persons with limited English proficiency, Executive Order 13166, Federal Register. 2000; 65(159).
2. Office for Civil Rights, Office of the Secretary, U.S. Department of Health and Human Services. Nondiscrimination in health programs and activities: final rule. Federal Register. 2016; 81(96), Part IV, https://www.gpo.gov/fdsys/pkg/FR-2016-05-18/pdf/2016-11458.pdf.
3. US Department of Justice: Limited English Proficiency. www.lep.gov.
4. US Department of Health and Human Services, Office of Minority Health: National Standards for Culturally and Linguistically Appropriate Services (CLAS) in Health and Health Care. https://www.thinkculturalhealth.hhs.gov/assets/pdfs/EnhancedNationalCLASStandards.pdf.
5. Weinreich U. Languages in Contact. New York: Linguistic Circle of New York; 1953.