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Prentice-Hall, 1992
Buku Teks
Kendrick, Tom, author
American Management Association, 2004
eBooks
Zul Effendi, author
Fakultas Teknik Universitas Indonesia, 2003
UI - Tesis (Membership)
Lewis, James P., author
Amacom, 1997
Buku Teks
Harrison, F.L., author
Gower, 1985
Buku Teks