APA (7th ed.) Citation

U.S. Department of Health, Education, and Welfare. (1973). User's manual for POPSIM. National Center for Health Statistics.

Chicago Style (17th ed.) Citation

U.S. Department of Health, Education, and Welfare. User's Manual for POPSIM. Rockville, Md: National Center for Health Statistics, 1973.

MLA (9th ed.) Citation

U.S. Department of Health, Education, and Welfare. User's Manual for POPSIM. National Center for Health Statistics, 1973.