Bryman, A. (2012). Social research methods (4th ed.). Oxford University Press.
Cita Chicago (17th ed.)Bryman, Alan. Social Research Methods. 4th ed. Oxford ; New York: Oxford University Press, 2012.
Cita MLA (8th ed.)Bryman, Alan. Social Research Methods. 4th ed. Oxford University Press, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.