CULTURE AND THE DIFFERENTIATION OF EMOTIONAL STATES by J. P. LEFF. British Journal of Psychiatry,123 (1973): 299-306

Bernstein, B. 1958. Some sociological determinants of perception. British Journal of Sociology, 9: 159-74.

Cooper, J.E. ; Kendell, R.E. ; Gurland, B.J. ; Sharpe, L. ; Copeland, J.R.M. ; and Simon, R. 1972. Psychiatric diagnosis in New York and London, Maudsley Monograph no. 20. London: Oxford University Press.

Crandell, D.L. and Dohrenwend, B.P. 1967. Some relations among psychiatric symptoms, organic illness and social class. American Journal of Psychiatry, 123: 1527-38.

Davitz, J.R. 1969. The language of emotion. New York and London: Academic Press.

Leighton, A.H. ; Lambo, T.A. ; Hughes, C.C. ; Leighton, D.C. ; Murphy, D.M. ; and Macklin, D.B. 1963. Psychiatric disorder among the Yoruba. New York: Cornell University Press.

World Health Organization. 1973. The international pilot study of schizophrenia. Geneva .