1. K. Dunnell, and A. Cartwright(1972 ) Medicine Takers, Prescribers and Hoarders , p. 11 . Routledge and Kegan Paul, London.
2. The body image barrier concept.
3. J. Fry(1966 ) Profiles of Disease: A Study in the Natural History of Common Diseases , p9 . E. and G. Livingstone, EdinburghandLondon.