Schonberger, Richard John, author
Business Publications, 1985
Buku Teks
Heizer, Jay, author
Allyn and Bacon, 1988
Buku Teks
Adam, Everett E., author
Prentice-Hall, 1989
Buku Teks
Hendrick, Thomas E., author
Richard D. Irwin, 1981
Buku Teks
Heizer, Jay, author
Prentice-Hal, 1996
Buku Teks