APA-viite (7. p.)
Walle, A. H. (2015). Qualitative research in business: A practical overview. Cambridge Scholars Publishing.
Chicago-viite (17. p.)
Walle, Alf H. Qualitative Research in Business: A Practical Overview. Newcastle upon Tyne, England: Cambridge Scholars Publishing, 2015.
MLA-viite (9. p.)
Walle, Alf H. Qualitative Research in Business: A Practical Overview. Cambridge Scholars Publishing, 2015.
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