1. Sinclair, H. M. (1972). In: Health and Food, Eds. Birch, G. G., Green, L. F. and Plasket, L. G., Applied Science Publishers Ltd, London, 11–27.
2. Moreton, R. (1970). A critical Study of ‘Health Food’ Attitudes. Thesis for B.Sc. degree, University of Reading.
3. Yudkin, J. (1973). J. Food Tech. Aust., 25(4), 201–205.
4. Whitehouse, G. T. (1968). Why Health Foods? ‘Here’s Health’, Surrey.
5. Which (1978). London, Consumers’ Association, 319–324.