Dyfyniad APA

Bryman, A. (2012). Social Research Methods (4th ed.). Oxford University Press.

Dyfyniad Arddull Chicago

Bryman, Alan. Social Research Methods. 4th ed. New York: Oxford University Press, 2012.

Dyfyniad MLA

Bryman, Alan. Social Research Methods. 4th ed. Oxford University Press, 2012.

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