APA (7th ed.) Citation

National Library of Medicine (U.S.). (1997). UMLS knowledge sources: Metathesaurus, semantic network, information sources map, specialist lexicon : Unified Medical Language System (8th ed.). U.S. Dept. of Health and Human Services, National Institutes of Health, National Library of Medicine.

Chicago Style (17th ed.) Citation

National Library of Medicine (U.S.). UMLS Knowledge Sources: Metathesaurus, Semantic Network, Information Sources Map, Specialist Lexicon : Unified Medical Language System. 8th ed. [Bethesda, Md.]: U.S. Dept. of Health and Human Services, National Institutes of Health, National Library of Medicine, 1997.

MLA (9th ed.) Citation

National Library of Medicine (U.S.). UMLS Knowledge Sources: Metathesaurus, Semantic Network, Information Sources Map, Specialist Lexicon : Unified Medical Language System. 8th ed. U.S. Dept. of Health and Human Services, National Institutes of Health, National Library of Medicine, 1997.