Bulmer, M. . J. A. (1977). Sociological research methods: An introduction. Macmillan.
Chicago-čujuhus (17. p.)Bulmer, Martin Joint Author. Sociological Research Methods: An Introduction. London: Macmillan, 1977.
MLA-čujuhus (9. p.)Bulmer, Martin Joint Author. Sociological Research Methods: An Introduction. Macmillan, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.