Lua APA (7ú heag.)

Bryman, A. (2001). Social research methods. O.U.P.

Lua i Stíl Chicago (17ú heag.)

Bryman, Alan. Social Research Methods. New York: O.U.P, 2001.

Lua MLA (9ú heag.)

Bryman, Alan. Social Research Methods. O.U.P, 2001.

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