Cita APA (7a ed.)

National Library of Medicine. (2009). UMLS reference manual. U.S. National Library of Medicine, National Institutes of Health, Health & Human Services.

Cita Chicago Style (17a ed.)

National Library of Medicine. UMLS Reference Manual. Bethesda, MD: U.S. National Library of Medicine, National Institutes of Health, Health & Human Services, 2009.

Cita MLA (9a ed.)

National Library of Medicine. UMLS Reference Manual. U.S. National Library of Medicine, National Institutes of Health, Health & Human Services, 2009.