Wolke, Robert L., author
Gramedia Pustaka Utama, 2003
Buku Teks
Scott, John, author
Spere British Institute of Management, 1984
Buku Teks
Martin, Garry, 1941-, author
Prentice-Hall, 1983
Buku Teks
Clinch, Peter
Aslib-IMI, 2000
Buku Teks
Collins, Harry, author
Cambridge University Press , 1993
Buku Teks