1. Beecher, H. K. 1972. ‘The placebo effect as a non-specific force surrounding disease and the treatment of disease’, in R. Janzen et al. (eds.), Pain: Basic Principles, Pharmacology, Therapy. Stuttgart: Thieme.
2. Benson, H. and McCallie, D. P. 1979. ‘Angina pectoris and the placebo effect’, New England Journal of Medicine
300, 1424–1429.
3. Blakiston’s Gould Medical Dictionary, 3rd ed. 1972. New York: McGraw-Hill.
4. Bok, S. 1974. ‘The ethics of giving placebos’, Scientific American
231 (November), 17–23.
5. Brody, H. 1977. Placebos and the Philosophy of Medicine. Chicago: University of Chicago Press.