REFERENCES
- Lewin , K. 1943 . Forces behind food habits and methods of change. . Bulletin of the National Research Council , 108 : 35 – 65 .
- Forsyth , D. R. and Burnette , J. L. 2005 . “ The history of group research. ” . In The handbook of group research and practice Edited by: Wheelan , S. A. London : Sage . (pp 3–18).