APA-viite (7. p.)
Payne, J., & Dorn, W. R. (2012). Managing indirect spend: Enhancing profitability through strategic sourcing. Wiley.
Chicago-viite (17. p.)
Payne, Joseph, ja William R. Dorn. Managing Indirect Spend: Enhancing Profitability Through Strategic Sourcing. Hoboken, N.J.: Wiley, 2012.
MLA-viite (9. p.)
Payne, Joseph, ja William R. Dorn. Managing Indirect Spend: Enhancing Profitability Through Strategic Sourcing. Wiley, 2012.
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