What is fiber? Academy of Nutrition and Dietetics. http://www.eatright.org/resource/food/vitamins-and-supplements/nutrient-rich-foods/fiber. Jan 2014. Accessed April 2017.
Larsen H. Ways to boost fiber. Academy of Nutrition and Dietetics. http://www.eatright.org/resource/food/vitamins-and-supplements/types-of-vitamins-and-nutrients/ways-to-boost-fiber. 2/5/2014. Accessed 3/24/2015
USDA. Dietary Guidelines for Americans, 2010. 7th Ed. Washington, DC: U.S. Government Printing Office, December 2010.