Gravetter, Frederick J., author
Cengage Learning, 2017
Buku Teks
Gravetter, Frederick J., author
Thomson Learning, 2000
Buku Teks
Kuzma, Jan W., author
McGraw-Hill, 2000
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Gravetter, Frederick J., author
Wadsworth/Thomson Learning, 2004
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Samuel, Myra L., author
Pearson - Prentice Hall, 2003
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