A practical guide to behavioral research tools and techniques por Sommer, Barbara Baker 1938-

Basic content analysis por Weber, Robert Philip

Practical sampling por Henry, Gary T.

Qualitative evaluation and research methods por Patton, Michael Quinn

Research methods por McNeill, Patrick

Basic content analysis por Weber, Robert Philip

Research methods por McNeill, Patrick

Qualitative evaluation and research methods por Patton, Michael Quinn

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Qualitative evaluation and research methods por Patton, Michael Quinn

Qualitative evaluation and research methods por Patton, Michael Quinn