1. Scale (Social sciences). In. p. From Wikipedia, the free encyclopedia. http://en.wikipedia.org/wiki/Scale_(social_sciences).
2. Scales and indexes. In. p. http://faculty.ncwc.edu/toconnor/308/lect05.htm.
3. Dietary pattern analysis: a new direction in nutritional epidemiology;Hu;Curr Opin Lipidol,2002
4. Indexes of overall diet quality: a review;Kant;J Am Diet Assoc,1996
5. Foods and nutrients;Mertz;J Am Diet Assoc,1984