1. R.C. Angell (1936), The Family Encounters the Depression, New York, Charles Scribner’s Sons.
2. R.C. Angell (1945), A Critical Review of the Development of the Personal Document Method in Sociology, 1920-1940, in L. Gottschalk, C. Kluckhohn C., R.C. Angell (eds.), «The Use of Personal Documents in History, Anthropology and Sociology, Committee on Appraisal of Research», Social Science Research Council, 53, pp. 177-232.
3. H. Becker, R. Hill (1948), Marriage and the Family, Boston, D.C. Health & Co.
4. L.L. Bernard (1924), Instinct: A Study in Social Psychology, New York, Henry Holt & Co..
5. H. Blumer (1933), Movies and Conduct, New York, Macmillan Co.