APA-viite (7. p.)
Williams, T. (2010). Positioning for professionals: How professional knowledge firms can differentiate their way to success. Wiley.
Chicago-viite (17. p.)
Williams, Tim. Positioning for Professionals: How Professional Knowledge Firms Can Differentiate Their Way to Success. Hoboken, N.J.: Wiley, 2010.
MLA-viite (9. p.)
Williams, Tim. Positioning for Professionals: How Professional Knowledge Firms Can Differentiate Their Way to Success. Wiley, 2010.
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