Neuman, W. L. (1997). Social research methods: Qualitative and quantitative approaches (3rd ed.). allyn and Bacon.
Cita Chicago (17th ed.)Neuman, William Lawrence. Social Research Methods: Qualitative and Quantitative Approaches. 3rd ed. Boston: allyn and Bacon, 1997.
Cita MLA (8th ed.)Neuman, William Lawrence. Social Research Methods: Qualitative and Quantitative Approaches. 3rd ed. allyn and Bacon, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.