Orr, A. D. (2004). Advanced project management: A complete guide to the processes, models and techniques. Kogan Page.
Chicago-viite (17. p.)Orr, Alan D. Advanced Project Management: A Complete Guide to the Processes, Models and Techniques. London ; Sterling, VA: Kogan Page, 2004.
MLA-viite (8. p.)Orr, Alan D. Advanced Project Management: A Complete Guide to the Processes, Models and Techniques. Kogan Page, 2004.
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