Ireland, Lewis R., author
Project Management Institute, 1991
Buku Teks
by Greg Bounds [and others]
McGraw-Hill, 1994
Buku Teks
Bank, John, author
Prentice-Hall, 2000
Buku Teks
Fandy Tjiptono, author
Andi Offset, 1996
Buku Teks
Prentice-Hall, 1995
Buku Teks