3H Walta,Dutch project management body of knowl- edge policy,International Journal of Project Management,Vol. 13,No.2,pp101-108,1995.
4William R Duncan,Developing a project-management body of knowledge document:the US Project Management In- stitute's Approach, 1983与4,International Journal of Project Management,Vol.13,N0.2,pp89与4,1995.