Project Management Institute. (2021). A Guide to the Project Management Body of Knowledge (7th.). Project Management Institute.
Chicago-viite (17. p.)Project Management Institute. A Guide to the Project Management Body of Knowledge. 7th. USA: Project Management Institute, 2021.
MLA-viite (9. p.)Project Management Institute. A Guide to the Project Management Body of Knowledge. 7th. Project Management Institute, 2021.
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