1. US Department of Agriculture. Food Groups Overview. ChooseMyPlate.gov. http://www.choosemyplate.gov/food-groups/. 2011. Accessed December 3, 2013.
2. US Department of Agriculture. What counts as a cup of vegetables? ChooseMyPlate.gov. http://www.choosemyplate.gov/food-groups/vegetables_counts_table.html. 2011. Accessed December 3, 2013.
3. US Department of Agriculture. What counts as an ounce equivalent of grains? ChooseMyPlate.gov. http://www.choosemyplate.gov/food-groups/grains_counts_table.html. 2011. Accessed December 3, 2013.
4. Dietary strategies for weight management;Rolls,2012
5. Portion size and the obesity epidemic;Kral,2011