APA (7th ed.) Citation

National Library of Medicine (U.S.) & National Institutes of Health (U.S.). (1981). Programs and services. The Library.

Chicago Style (17th ed.) Citation

National Library of Medicine (U.S.) and National Institutes of Health (U.S.). Programs and Services. Bethesda, Md.: The Library, 1981.

MLA (9th ed.) Citation

National Library of Medicine (U.S.) and National Institutes of Health (U.S.). Programs and Services. The Library, 1981.