APA (7th ed.) Citation

(2012). Constipation (Revised February 2012.). U.S. Department of Health and Human Services, National Institutes of Health, National Cancer Institute.

Chicago Style (17th ed.) Citation

Constipation. Revised February 2012. [Bethesda, Md.]: U.S. Department of Health and Human Services, National Institutes of Health, National Cancer Institute, 2012.

MLA (9th ed.) Citation

Constipation. Revised February 2012. U.S. Department of Health and Human Services, National Institutes of Health, National Cancer Institute, 2012.