Collis, J. (2003). Business research: A practical guide for undergraduate and postgraduate students. New York: Palgrave Macmillan.
Chicago-tyylinen lähdeviittausCollis, Jill. Business Research: A Practical Guide for Undergraduate and Postgraduate Students. New York: Palgrave Macmillan, 2003.
MLA-viiteCollis, Jill. Business Research: A Practical Guide for Undergraduate and Postgraduate Students. New York: Palgrave Macmillan, 2003.
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