Dalrymple, Douglas J.
John Wiley & Sons, 1983
Buku Teks
Levitt, Theodore
Pan Books, 1962
Buku Teks
Levitt, Theodore
McGraw-Hill, 1962
Buku Teks
Dalrymple, Douglas J.
John Wiley & Sons, 1995
Buku Teks
Kotler, Philip
[American Management Association, ], 2009
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