Neuman, W. L. (2007). Basics of Social Research: Qualitative and Quantitative Approaches / W. Lawrence Neuman. Pearson.
Lua i Stíl Chicago (17ú heag.)Neuman, W. Lawrence. Basics of Social Research: Qualitative and Quantitative Approaches / W. Lawrence Neuman. Pearson, 2007.
Lua MLA (8ú heag.)Neuman, W. Lawrence. Basics of Social Research: Qualitative and Quantitative Approaches / W. Lawrence Neuman. Pearson, 2007.
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