National Library of Medicine (U.S.). (2009). UMLS reference manual. Bethesda, MD: U.S. National Library of Medicine, National Institutes of Health, Health & Human Services.
Chicago Style CitationNational Library of Medicine (U.S.). UMLS Reference Manual. Bethesda, MD: U.S. National Library of Medicine, National Institutes of Health, Health & Human Services, 2009.
MLA CitationNational Library of Medicine (U.S.). UMLS Reference Manual. Bethesda, MD: U.S. National Library of Medicine, National Institutes of Health, Health & Human Services, 2009.
Warning: These citations may not always be 100% accurate.