APA

U.S. Preventive Services Task Force, United States, .Electronic preventive services selector: ePSS for PDA. Rockville, MD: U.S. Dept. of Health and Human Services, Agency for Healthcare Research and Quality.

Chicago

U.S. Preventive Services Task Force, United States, .Electronic preventive services selector: ePSS for PDA. Rockville, MD: U.S. Dept. of Health and Human Services, Agency for Healthcare Research and Quality.

Harvard

U.S. Preventive Services Task Force, United States, .Electronic preventive services selector: ePSS for PDA. Rockville, MD: U.S. Dept. of Health and Human Services, Agency for Healthcare Research and Quality.

MLA

U.S. Preventive Services Task Force, United States, .Rockville, MD: U.S. Dept. of Health and Human Services, Agency for Healthcare Research and Quality. .