MORGAN DAVID L. (1997). FOCUS GROUPS AS QUALITATIVE RESEARCH. SAGE PUBLICATIONS.
Chicago-viite (17. p.)MORGAN DAVID L. FOCUS GROUPS AS QUALITATIVE RESEARCH. NEW DELHI: SAGE PUBLICATIONS, 1997.
MLA-viite (9. p.)MORGAN DAVID L. FOCUS GROUPS AS QUALITATIVE RESEARCH. SAGE PUBLICATIONS, 1997.
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