Lee, Sidney, Sir, 1859-1926, author
IMS Pacific, 1985
Buku Teks
edited by Larry Wizenberg
Dow Jones-Irwin, 1986
Buku Referensi
Brethauer, Dale, author
[American Management Association, ], 2002
eBooks
Choffray, Jean-Marie, author
John Wiley, 1980
Buku Teks
Kuczmarski, Thomas D., author
Prentice-Hall International, 1992
Buku Teks