Stone, Bob
Prentice-Hall, 1986
Buku Teks
Harry T. Yani Achsan
Fakultas Ilmu Komputer Universitas Indonesia, 1998
UI - Tesis Membership
Roman, Murray
McGraw-Hill, 1976
Buku Teks
Goldner, Paul S.
American Management Association;, 2006
eBooks
Boyan, Lee
American Management Association, 1989
eBooks