Center for Drug Evaluation and Research (U.S.). Division of Data Management and Services. National drug code directory. U.S. Department of Health and Human Services, Public Health Service, Food and Drug Administration, Center for Drug Evaluation and Research, Division of Data Management and Services.
Chicago Style (17th ed.) CitationCenter for Drug Evaluation and Research (U.S.). Division of Data Management and Services. National Drug Code Directory. Silver Spring, MD: U.S. Department of Health and Human Services, Public Health Service, Food and Drug Administration, Center for Drug Evaluation and Research, Division of Data Management and Services.
MLA (9th ed.) CitationCenter for Drug Evaluation and Research (U.S.). Division of Data Management and Services. National Drug Code Directory. U.S. Department of Health and Human Services, Public Health Service, Food and Drug Administration, Center for Drug Evaluation and Research, Division of Data Management and Services.