Lua APA (7ú heag.)

Bulmer, M. . J. A. (1977). Sociological research methods: An introduction. Macmillan.

Lua i Stíl Chicago (17ú heag.)

Bulmer, Martin Joint Author. Sociological Research Methods: An Introduction. London: Macmillan, 1977.

Lua MLA (9ú heag.)

Bulmer, Martin Joint Author. Sociological Research Methods: An Introduction. Macmillan, 1977.

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