Stephen P. Sayers, PhD and Kyle Gibson, PT, PhD
My Plate US Government
Michael Pollan- Food Rules https://michaelpollan.com/reviews/how-to-eat/
PEHP Healthy Utah, www.pehp.org/mango/pdf/pehp/pdc/step%20conversion%20chart_FFB805BB.pdf
The Step Diet by James O. Hill, PH.D., John C. Peters, Ph.D., with Bonnie T. Jortberg, M.S.,R.D. https://www.webmd.com/diet/features/the-step-diet#1
By Dana Santas, CNN