1. Deficiency of vitamin B12 among Jordanian people with psychological and biological activity;Al-Fararjeh;African Journal of Biochemistry Research,2011
2. Vitamin B12 status in males and females of different age groups;Qatatsheh;American Journal of Agricultural and Biological Sciences,2011
3. Marshall WJ Bangert SK Clinical Biochemistry: Metabolic and Clinical Churchill Livingstone, Elsevier London, UK
4. Statistics in the practice of medicine;Hoffmann;JAMA,1963
5. Vitamin B12 deficiency in Jordan: A population based study;El-Khateeb;Annals of Nutrition & Metabolism,2014