APA-viite (7. p.)
(2000). Greener public purchasing: Issues and practical solutions. Organisation for Economic Co-operation and Development.
Chicago-viite (17. p.)
Greener Public Purchasing: Issues and Practical Solutions. Paris: Organisation for Economic Co-operation and Development, 2000.
MLA-viite (9. p.)
Greener Public Purchasing: Issues and Practical Solutions. Organisation for Economic Co-operation and Development, 2000.
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