^PMBOK Guide: A Guide to the Project Management Body of Knowledge by Project Management Institute - 5th Edition (Paperback, 2013)ISBN 9781935589679 (revised Apr 2018)
^Project Management Institute (2015). A Guide to the Project Management Body of Knowledge: Pmbok Guide, Project Management Inst. BiggerBooks. ISBN 9781935589679 (revised Dec 2023)
^Project Management InstituteA Guide to the Project Management Body of Knowledge: PMBOK(R) Guide, Project Management Institute. Amazon. ISBN 9781935589679 (revised Sep 2014)