Lorie, James H., author
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Buku Teks
Aaker, David A., author
John Wiley & Sons, 2000
Buku Teks
Crisp, Richard D., author
McGraw-Hill, 1957
Buku Teks
Kinnear, Thomas C., 1943-, author
McGraw-Hill, 1991
Buku Teks
Kinnear, Thomas C., 1943-, author
McGraw-Hill, 1996
Buku Teks