Deming, W. Edwards, author
John Wiley & Sons, 1960
Buku Teks
Cooper, Donald R., author
McGraw-Hill, 2001
Buku Teks
Zikmund, William G., author
The Dryden Press , 1991
Buku Teks
Zikmund, William G., author
The Dryden Press, 1988
Buku Teks
Cooper, Donald R., author
McGraw-Hill, 2008
Buku Teks