Belch, George E., author
McGraw-Hill, 2015
Buku Teks
general editor, Panayotis Tournikiotis ; English translation, Cox and Solman
Melissa, 1996
Buku Teks
Nicosia, Francesco M.
Prentice-Hall, 1968
Buku Teks
Shimp, Terence A., author
The Dryden Press , 1997
Buku Teks
Weller, Bart, author
Springer, 2012
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