"Dietary Guidelines for Americans 2005", U.S. Department of Health and Human Services; U.S. Department of Agriculture www.healthierus.gov/dietaryguidelines [1]Arquivado 18 de xullo de 2008 en Wayback Machine.
web.archive.org
"Dietary Guidelines for Americans 2005", U.S. Department of Health and Human Services; U.S. Department of Agriculture www.healthierus.gov/dietaryguidelines [1]Arquivado 18 de xullo de 2008 en Wayback Machine.