| 1 | Understanding Nutrition Eleanor Noss Whitney, Sharon Rady Rolfes, 13th edition. Wadsworth Publishing, 2012 |
| 2 | Mahan, L.K., Stump, S.E. Krause's Food & Nutrition Therapy. 12th edition, Elsevier, 2010. |
| 3 | Levetin- Mc Mahon Plants and Society 2th edition McGraw Hill 2008. |