United States. Dept. of Agriculture. Principles of nutrition and nutritive value of food.. Washington, D.C.. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc6413/. Accessed March 31, 2015.
Note: Inconsistencies in capitalization and punctuation within the Digital Library may affect this citation. Before using this citation in formal writing, please consult your preferred style manual. More information.