VAUS DAVID DE. (2006). RESEARCH DESIGN - VOL. IV. SAGE PUBLICATIONS.
Chicago-čujuhus (17. p.)VAUS DAVID DE. RESEARCH DESIGN - VOL. IV. LONDON: SAGE PUBLICATIONS, 2006.
MLA-čujuhus (9. p.)VAUS DAVID DE. RESEARCH DESIGN - VOL. IV. SAGE PUBLICATIONS, 2006.
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